gt:         carry7 = s7 >> 21; s8 += carry7; s7 -= carry7 << 21;
context: package Punisher.NaCl.Internal.Ed25519Ref10;
  
  public class ScalarOperations
  {
      
      static long load_3(byte[] input, int offset)
      {
          long result;
          result = (long)(input[offset + 0]& 0xFF);
          result |= ((long)input[offset + 1]& 0xFF) << 8;
          result |= ((long)input[offset + 2]& 0xFF) << 16;
          return result;
      }
  
      static long load_4(byte[] input, int offset)
      {
          long result;
          result = (long)(input[offset + 0]& 0xFF);
          result |= ((long)input[offset + 1]& 0xFF) << 8;
          result |= ((long)input[offset + 2]& 0xFF) << 16;
          result |= ((long)input[offset + 3]& 0xFF) << 24;
          return result;
      }
      
      /*
      Input:
        s[0]+256*s[1]+...+256^63*s[63] = s
  
      Output:
        s[0]+256*s[1]+...+256^31*s[31] = s mod l
        where l = 2^252 + 27742317777372353535851937790883648493.
        Overwrites s in place.
      */
  
      public static void sc_reduce(byte[] s)
      {
          long s0 = 2097151 & load_3(s, 0);
          long s1 = 2097151 & (load_4(s, 2) >> 5);
          long s2 = 2097151 & (load_3(s, 5) >> 2);
          long s3 = 2097151 & (load_4(s, 7) >> 7);
          long s4 = 2097151 & (load_4(s, 10) >> 4);
          long s5 = 2097151 & (load_3(s, 13) >> 1);
          long s6 = 2097151 & (load_4(s, 15) >> 6);
          long s7 = 2097151 & (load_3(s, 18) >> 3);
          long s8 = 2097151 & load_3(s, 21);
          long s9 = 2097151 & (load_4(s, 23) >> 5);
          long s10 = 2097151 & (load_3(s, 26) >> 2);
          long s11 = 2097151 & (load_4(s, 28) >> 7);
          long s12 = 2097151 & (load_4(s, 31) >> 4);
          long s13 = 2097151 & (load_3(s, 34) >> 1);
          long s14 = 2097151 & (load_4(s, 36) >> 6);
          long s15 = 2097151 & (load_3(s, 39) >> 3);
          long s16 = 2097151 & load_3(s, 42);
          long s17 = 2097151 & (load_4(s, 44) >> 5);
          long s18 = 2097151 & (load_3(s, 47) >> 2);
          long s19 = 2097151 & (load_4(s, 49) >> 7);
          long s20 = 2097151 & (load_4(s, 52) >> 4);
          long s21 = 2097151 & (load_3(s, 55) >> 1);
          long s22 = 2097151 & (load_4(s, 57) >> 6);
          long s23 = (load_4(s, 60) >> 3);
          long carry0;
          long carry1;
          long carry2;
          long carry3;
          long carry4;
          long carry5;
          long carry6;
          long carry7;
          long carry8;
          long carry9;
          long carry10;
          long carry11;
          long carry12;
          long carry13;
          long carry14;
          long carry15;
          long carry16;
  
          s11 += s23 * 666643;
          s12 += s23 * 470296;
          s13 += s23 * 654183;
          s14 -= s23 * 997805;
          s15 += s23 * 136657;
          s16 -= s23 * 683901;
          s23 = 0;
  
          s10 += s22 * 666643;
          s11 += s22 * 470296;
          s12 += s22 * 654183;
          s13 -= s22 * 997805;
          s14 += s22 * 136657;
          s15 -= s22 * 683901;
          s22 = 0;
  
          s9 += s21 * 666643;
          s10 += s21 * 470296;
          s11 += s21 * 654183;
          s12 -= s21 * 997805;
          s13 += s21 * 136657;
          s14 -= s21 * 683901;
          s21 = 0;
  
          s8 += s20 * 666643;
          s9 += s20 * 470296;
          s10 += s20 * 654183;
          s11 -= s20 * 997805;
          s12 += s20 * 136657;
          s13 -= s20 * 683901;
          s20 = 0;
  
          s7 += s19 * 666643;
          s8 += s19 * 470296;
          s9 += s19 * 654183;
          s10 -= s19 * 997805;
          s11 += s19 * 136657;
          s12 -= s19 * 683901;
          s19 = 0;
  
          s6 += s18 * 666643;
          s7 += s18 * 470296;
          s8 += s18 * 654183;
          s9 -= s18 * 997805;
          s10 += s18 * 136657;
          s11 -= s18 * 683901;
          s18 = 0;
  
          carry6 = (s6 + (1 << 20)) >> 21; s7 += carry6; s6 -= carry6 << 21;
          carry8 = (s8 + (1 << 20)) >> 21; s9 += carry8; s8 -= carry8 << 21;
          carry10 = (s10 + (1 << 20)) >> 21; s11 += carry10; s10 -= carry10 << 21;
          carry12 = (s12 + (1 << 20)) >> 21; s13 += carry12; s12 -= carry12 << 21;
          carry14 = (s14 + (1 << 20)) >> 21; s15 += carry14; s14 -= carry14 << 21;
          carry16 = (s16 + (1 << 20)) >> 21; s17 += carry16; s16 -= carry16 << 21;
  
          carry7 = (s7 + (1 << 20)) >> 21; s8 += carry7; s7 -= carry7 << 21;
          carry9 = (s9 + (1 << 20)) >> 21; s10 += carry9; s9 -= carry9 << 21;
          carry11 = (s11 + (1 << 20)) >> 21; s12 += carry11; s11 -= carry11 << 21;
          carry13 = (s13 + (1 << 20)) >> 21; s14 += carry13; s13 -= carry13 << 21;
          carry15 = (s15 + (1 << 20)) >> 21; s16 += carry15; s15 -= carry15 << 21;
  
          s5 += s17 * 666643;
          s6 += s17 * 470296;
          s7 += s17 * 654183;
          s8 -= s17 * 997805;
          s9 += s17 * 136657;
          s10 -= s17 * 683901;
          s17 = 0;
  
          s4 += s16 * 666643;
          s5 += s16 * 470296;
          s6 += s16 * 654183;
          s7 -= s16 * 997805;
          s8 += s16 * 136657;
          s9 -= s16 * 683901;
          s16 = 0;
  
          s3 += s15 * 666643;
          s4 += s15 * 470296;
          s5 += s15 * 654183;
          s6 -= s15 * 997805;
          s7 += s15 * 136657;
          s8 -= s15 * 683901;
          s15 = 0;
  
          s2 += s14 * 666643;
          s3 += s14 * 470296;
          s4 += s14 * 654183;
          s5 -= s14 * 997805;
          s6 += s14 * 136657;
          s7 -= s14 * 683901;
          s14 = 0;
  
          s1 += s13 * 666643;
          s2 += s13 * 470296;
          s3 += s13 * 654183;
          s4 -= s13 * 997805;
          s5 += s13 * 136657;
          s6 -= s13 * 683901;
          s13 = 0;
  
          s0 += s12 * 666643;
          s1 += s12 * 470296;
          s2 += s12 * 654183;
          s3 -= s12 * 997805;
          s4 += s12 * 136657;
          s5 -= s12 * 683901;
          s12 = 0;
  
          carry0 = (s0 + (1 << 20)) >> 21; s1 += carry0; s0 -= carry0 << 21;
          carry2 = (s2 + (1 << 20)) >> 21; s3 += carry2; s2 -= carry2 << 21;
          carry4 = (s4 + (1 << 20)) >> 21; s5 += carry4; s4 -= carry4 << 21;
          carry6 = (s6 + (1 << 20)) >> 21; s7 += carry6; s6 -= carry6 << 21;
          carry8 = (s8 + (1 << 20)) >> 21; s9 += carry8; s8 -= carry8 << 21;
          carry10 = (s10 + (1 << 20)) >> 21; s11 += carry10; s10 -= carry10 << 21;
  
          carry1 = (s1 + (1 << 20)) >> 21; s2 += carry1; s1 -= carry1 << 21;
          carry3 = (s3 + (1 << 20)) >> 21; s4 += carry3; s3 -= carry3 << 21;
          carry5 = (s5 + (1 << 20)) >> 21; s6 += carry5; s5 -= carry5 << 21;
          carry7 = (s7 + (1 << 20)) >> 21; s8 += carry7; s7 -= carry7 << 21;
          carry9 = (s9 + (1 << 20)) >> 21; s10 += carry9; s9 -= carry9 << 21;
          carry11 = (s11 + (1 << 20)) >> 21; s12 += carry11; s11 -= carry11 << 21;
  
          s0 += s12 * 666643;
          s1 += s12 * 470296;
          s2 += s12 * 654183;
          s3 -= s12 * 997805;
          s4 += s12 * 136657;
          s5 -= s12 * 683901;
          s12 = 0;
  
          carry0 = s0 >> 21; s1 += carry0; s0 -= carry0 << 21;
          carry1 = s1 >> 21; s2 += carry1; s1 -= carry1 << 21;
          carry2 = s2 >> 21; s3 += carry2; s2 -= carry2 << 21;
          carry3 = s3 >> 21; s4 += carry3; s3 -= carry3 << 21;
          carry4 = s4 >> 21; s5 += carry4; s4 -= carry4 << 21;
          carry5 = s5 >> 21; s6 += carry5; s5 -= carry5 << 21;
          carry6 = s6 >> 21; s7 += carry6; s6 -= carry6 << 21;
          carry7 = s7 >> 21; s8 += carry7; s7 -= carry7 << 21;
          carry8 = s8 >> 21; s9 += carry8; s8 -= carry8 << 21;
          carry9 = s9 >> 21; s10 += carry9; s9 -= carry9 << 21;
          carry10 = s10 >> 21; s11 += carry10; s10 -= carry10 << 21;
          carry11 = s11 >> 21; s12 += carry11; s11 -= carry11 << 21;
  
          s0 += s12 * 666643;
          s1 += s12 * 470296;
          s2 += s12 * 654183;
          s3 -= s12 * 997805;
          s4 += s12 * 136657;
          s5 -= s12 * 683901;
          s12 = 0;
  
          carry0 = s0 >> 21; s1 += carry0; s0 -= carry0 << 21;
          carry1 = s1 >> 21; s2 += carry1; s1 -= carry1 << 21;
          carry2 = s2 >> 21; s3 += carry2; s2 -= carry2 << 21;
          carry3 = s3 >> 21; s4 += carry3; s3 -= carry3 << 21;
          carry4 = s4 >> 21; s5 += carry4; s4 -= carry4 << 21;
          carry5 = s5 >> 21; s6 += carry5; s5 -= carry5 << 21;
          carry6 = s6 >> 21; s7 += carry6; s6 -= carry6 << 21;
          carry7 = s7 >> 21; s8 += carry7; s7 -= carry7 << 21;
          carry8 = s8 >> 21; s9 += carry8; s8 -= carry8 << 21;
          carry9 = s9 >> 21; s10 += carry9; s9 -= carry9 << 21;
          carry10 = s10 >> 21; s11 += carry10; s10 -= carry10 << 21;
  
          
          {
              s[0] = (byte)(s0 >> 0);
              s[1] = (byte)(s0 >> 8);
              s[2] = (byte)((s0 >> 16) | (s1 << 5));
              s[3] = (byte)(s1 >> 3);
              s[4] = (byte)(s1 >> 11);
              s[5] = (byte)((s1 >> 19) | (s2 << 2));
              s[6] = (byte)(s2 >> 6);
              s[7] = (byte)((s2 >> 14) | (s3 << 7));
              s[8] = (byte)(s3 >> 1);
              s[9] = (byte)(s3 >> 9);
              s[10] = (byte)((s3 >> 17) | (s4 << 4));
              s[11] = (byte)(s4 >> 4);
              s[12] = (byte)(s4 >> 12);
              s[13] = (byte)((s4 >> 20) | (s5 << 1));
              s[14] = (byte)(s5 >> 7);
              s[15] = (byte)((s5 >> 15) | (s6 << 6));
              s[16] = (byte)(s6 >> 2);
              s[17] = (byte)(s6 >> 10);
              s[18] = (byte)((s6 >> 18) | (s7 << 3));
              s[19] = (byte)(s7 >> 5);
              s[20] = (byte)(s7 >> 13);
              s[21] = (byte)(s8 >> 0);
              s[22] = (byte)(s8 >> 8);
              s[23] = (byte)((s8 >> 16) | (s9 << 5));
              s[24] = (byte)(s9 >> 3);
              s[25] = (byte)(s9 >> 11);
              s[26] = (byte)((s9 >> 19) | (s10 << 2));
              s[27] = (byte)(s10 >> 6);
              s[28] = (byte)((s10 >> 14) | (s11 << 7));
              s[29] = (byte)(s11 >> 1);
              s[30] = (byte)(s11 >> 9);
              s[31] = (byte)(s11 >> 17);
          }
      }
      
          
      public static void sc_clamp(byte[] s, int offset)
      {
          s[offset + 0] &= 248;
          s[offset + 31] &= 127;
          s[offset + 31] |= 64;
      }
      
  
      /*
      Input:
        a[0]+256*a[1]+...+256^31*a[31] = a
        b[0]+256*b[1]+...+256^31*b[31] = b
        c[0]+256*c[1]+...+256^31*c[31] = c
  
      Output:
        s[0]+256*s[1]+...+256^31*s[31] = (ab+c) mod l
        where l = 2^252 + 27742317777372353535851937790883648493.
      */
  
      public static void sc_muladd(byte[] s, byte[] a, byte[] b, byte[] c)
      {
          long a0 = 2097151 & load_3(a, 0);
          long a1 = 2097151 & (load_4(a, 2) >> 5);
          long a2 = 2097151 & (load_3(a, 5) >> 2);
          long a3 = 2097151 & (load_4(a, 7) >> 7);
          long a4 = 2097151 & (load_4(a, 10) >> 4);
          long a5 = 2097151 & (load_3(a, 13) >> 1);
          long a6 = 2097151 & (load_4(a, 15) >> 6);
          long a7 = 2097151 & (load_3(a, 18) >> 3);
          long a8 = 2097151 & load_3(a, 21);
          long a9 = 2097151 & (load_4(a, 23) >> 5);
          long a10 = 2097151 & (load_3(a, 26) >> 2);
          long a11 = (load_4(a, 28) >> 7);
          long b0 = 2097151 & load_3(b, 0);
          long b1 = 2097151 & (load_4(b, 2) >> 5);
          long b2 = 2097151 & (load_3(b, 5) >> 2);
          long b3 = 2097151 & (load_4(b, 7) >> 7);
          long b4 = 2097151 & (load_4(b, 10) >> 4);
          long b5 = 2097151 & (load_3(b, 13) >> 1);
          long b6 = 2097151 & (load_4(b, 15) >> 6);
          long b7 = 2097151 & (load_3(b, 18) >> 3);
          long b8 = 2097151 & load_3(b, 21);
          long b9 = 2097151 & (load_4(b, 23) >> 5);
          long b10 = 2097151 & (load_3(b, 26) >> 2);
          long b11 = (load_4(b, 28) >> 7);
          long c0 = 2097151 & load_3(c, 0);
          long c1 = 2097151 & (load_4(c, 2) >> 5);
          long c2 = 2097151 & (load_3(c, 5) >> 2);
          long c3 = 2097151 & (load_4(c, 7) >> 7);
          long c4 = 2097151 & (load_4(c, 10) >> 4);
          long c5 = 2097151 & (load_3(c, 13) >> 1);
          long c6 = 2097151 & (load_4(c, 15) >> 6);
          long c7 = 2097151 & (load_3(c, 18) >> 3);
          long c8 = 2097151 & load_3(c, 21);
          long c9 = 2097151 & (load_4(c, 23) >> 5);
          long c10 = 2097151 & (load_3(c, 26) >> 2);
          long c11 = (load_4(c, 28) >> 7);
          long s0;
          long s1;
          long s2;
          long s3;
          long s4;
          long s5;
          long s6;
          long s7;
          long s8;
          long s9;
          long s10;
          long s11;
          long s12;
          long s13;
          long s14;
          long s15;
          long s16;
          long s17;
          long s18;
          long s19;
          long s20;
          long s21;
          long s22;
          long s23;
          long carry0;
          long carry1;
          long carry2;
          long carry3;
          long carry4;
          long carry5;
          long carry6;
          long carry7;
          long carry8;
          long carry9;
          long carry10;
          long carry11;
          long carry12;
          long carry13;
          long carry14;
          long carry15;
          long carry16;
          long carry17;
          long carry18;
          long carry19;
          long carry20;
          long carry21;
          long carry22;
  
          s0 = c0 + a0 * b0;
          s1 = c1 + a0 * b1 + a1 * b0;
          s2 = c2 + a0 * b2 + a1 * b1 + a2 * b0;
          s3 = c3 + a0 * b3 + a1 * b2 + a2 * b1 + a3 * b0;
          s4 = c4 + a0 * b4 + a1 * b3 + a2 * b2 + a3 * b1 + a4 * b0;
          s5 = c5 + a0 * b5 + a1 * b4 + a2 * b3 + a3 * b2 + a4 * b1 + a5 * b0;
          s6 = c6 + a0 * b6 + a1 * b5 + a2 * b4 + a3 * b3 + a4 * b2 + a5 * b1 + a6 * b0;
          s7 = c7 + a0 * b7 + a1 * b6 + a2 * b5 + a3 * b4 + a4 * b3 + a5 * b2 + a6 * b1 + a7 * b0;
          s8 = c8 + a0 * b8 + a1 * b7 + a2 * b6 + a3 * b5 + a4 * b4 + a5 * b3 + a6 * b2 + a7 * b1 + a8 * b0;
          s9 = c9 + a0 * b9 + a1 * b8 + a2 * b7 + a3 * b6 + a4 * b5 + a5 * b4 + a6 * b3 + a7 * b2 + a8 * b1 + a9 * b0;
          s10 = c10 + a0 * b10 + a1 * b9 + a2 * b8 + a3 * b7 + a4 * b6 + a5 * b5 + a6 * b4 + a7 * b3 + a8 * b2 + a9 * b1 + a10 * b0;
          s11 = c11 + a0 * b11 + a1 * b10 + a2 * b9 + a3 * b8 + a4 * b7 + a5 * b6 + a6 * b5 + a7 * b4 + a8 * b3 + a9 * b2 + a10 * b1 + a11 * b0;
          s12 = a1 * b11 + a2 * b10 + a3 * b9 + a4 * b8 + a5 * b7 + a6 * b6 + a7 * b5 + a8 * b4 + a9 * b3 + a10 * b2 + a11 * b1;
          s13 = a2 * b11 + a3 * b10 + a4 * b9 + a5 * b8 + a6 * b7 + a7 * b6 + a8 * b5 + a9 * b4 + a10 * b3 + a11 * b2;
          s14 = a3 * b11 + a4 * b10 + a5 * b9 + a6 * b8 + a7 * b7 + a8 * b6 + a9 * b5 + a10 * b4 + a11 * b3;
          s15 = a4 * b11 + a5 * b10 + a6 * b9 + a7 * b8 + a8 * b7 + a9 * b6 + a10 * b5 + a11 * b4;
          s16 = a5 * b11 + a6 * b10 + a7 * b9 + a8 * b8 + a9 * b7 + a10 * b6 + a11 * b5;
          s17 = a6 * b11 + a7 * b10 + a8 * b9 + a9 * b8 + a10 * b7 + a11 * b6;
          s18 = a7 * b11 + a8 * b10 + a9 * b9 + a10 * b8 + a11 * b7;
          s19 = a8 * b11 + a9 * b10 + a10 * b9 + a11 * b8;
          s20 = a9 * b11 + a10 * b10 + a11 * b9;
          s21 = a10 * b11 + a11 * b10;
          s22 = a11 * b11;
          s23 = 0;
  
          carry0 = (s0 + (1 << 20)) >> 21; s1 += carry0; s0 -= carry0 << 21;
          carry2 = (s2 + (1 << 20)) >> 21; s3 += carry2; s2 -= carry2 << 21;
          carry4 = (s4 + (1 << 20)) >> 21; s5 += carry4; s4 -= carry4 << 21;
          carry6 = (s6 + (1 << 20)) >> 21; s7 += carry6; s6 -= carry6 << 21;
          carry8 = (s8 + (1 << 20)) >> 21; s9 += carry8; s8 -= carry8 << 21;
          carry10 = (s10 + (1 << 20)) >> 21; s11 += carry10; s10 -= carry10 << 21;
          carry12 = (s12 + (1 << 20)) >> 21; s13 += carry12; s12 -= carry12 << 21;
          carry14 = (s14 + (1 << 20)) >> 21; s15 += carry14; s14 -= carry14 << 21;
          carry16 = (s16 + (1 << 20)) >> 21; s17 += carry16; s16 -= carry16 << 21;
          carry18 = (s18 + (1 << 20)) >> 21; s19 += carry18; s18 -= carry18 << 21;
          carry20 = (s20 + (1 << 20)) >> 21; s21 += carry20; s20 -= carry20 << 21;
          carry22 = (s22 + (1 << 20)) >> 21; s23 += carry22; s22 -= carry22 << 21;
  
          carry1 = (s1 + (1 << 20)) >> 21; s2 += carry1; s1 -= carry1 << 21;
          carry3 = (s3 + (1 << 20)) >> 21; s4 += carry3; s3 -= carry3 << 21;
          carry5 = (s5 + (1 << 20)) >> 21; s6 += carry5; s5 -= carry5 << 21;
          carry7 = (s7 + (1 << 20)) >> 21; s8 += carry7; s7 -= carry7 << 21;
          carry9 = (s9 + (1 << 20)) >> 21; s10 += carry9; s9 -= carry9 << 21;
          carry11 = (s11 + (1 << 20)) >> 21; s12 += carry11; s11 -= carry11 << 21;
          carry13 = (s13 + (1 << 20)) >> 21; s14 += carry13; s13 -= carry13 << 21;
          carry15 = (s15 + (1 << 20)) >> 21; s16 += carry15; s15 -= carry15 << 21;
          carry17 = (s17 + (1 << 20)) >> 21; s18 += carry17; s17 -= carry17 << 21;
          carry19 = (s19 + (1 << 20)) >> 21; s20 += carry19; s19 -= carry19 << 21;
          carry21 = (s21 + (1 << 20)) >> 21; s22 += carry21; s21 -= carry21 << 21;
  
          s11 += s23 * 666643;
          s12 += s23 * 470296;
          s13 += s23 * 654183;
          s14 -= s23 * 997805;
          s15 += s23 * 136657;
          s16 -= s23 * 683901;
          s23 = 0;
  
          s10 += s22 * 666643;
          s11 += s22 * 470296;
          s12 += s22 * 654183;
          s13 -= s22 * 997805;
          s14 += s22 * 136657;
          s15 -= s22 * 683901;
          s22 = 0;
  
          s9 += s21 * 666643;
          s10 += s21 * 470296;
          s11 += s21 * 654183;
          s12 -= s21 * 997805;
          s13 += s21 * 136657;
          s14 -= s21 * 683901;
          s21 = 0;
  
          s8 += s20 * 666643;
          s9 += s20 * 470296;
          s10 += s20 * 654183;
          s11 -= s20 * 997805;
          s12 += s20 * 136657;
          s13 -= s20 * 683901;
          s20 = 0;
  
          s7 += s19 * 666643;
          s8 += s19 * 470296;
          s9 += s19 * 654183;
          s10 -= s19 * 997805;
          s11 += s19 * 136657;
          s12 -= s19 * 683901;
          s19 = 0;
  
          s6 += s18 * 666643;
          s7 += s18 * 470296;
          s8 += s18 * 654183;
          s9 -= s18 * 997805;
          s10 += s18 * 136657;
          s11 -= s18 * 683901;
          s18 = 0;
  
          carry6 = (s6 + (1 << 20)) >> 21; s7 += carry6; s6 -= carry6 << 21;
          carry8 = (s8 + (1 << 20)) >> 21; s9 += carry8; s8 -= carry8 << 21;
          carry10 = (s10 + (1 << 20)) >> 21; s11 += carry10; s10 -= carry10 << 21;
          carry12 = (s12 + (1 << 20)) >> 21; s13 += carry12; s12 -= carry12 << 21;
          carry14 = (s14 + (1 << 20)) >> 21; s15 += carry14; s14 -= carry14 << 21;
          carry16 = (s16 + (1 << 20)) >> 21; s17 += carry16; s16 -= carry16 << 21;
  
          carry7 = (s7 + (1 << 20)) >> 21; s8 += carry7; s7 -= carry7 << 21;
          carry9 = (s9 + (1 << 20)) >> 21; s10 += carry9; s9 -= carry9 << 21;
          carry11 = (s11 + (1 << 20)) >> 21; s12 += carry11; s11 -= carry11 << 21;
          carry13 = (s13 + (1 << 20)) >> 21; s14 += carry13; s13 -= carry13 << 21;
          carry15 = (s15 + (1 << 20)) >> 21; s16 += carry15; s15 -= carry15 << 21;
  
          s5 += s17 * 666643;
          s6 += s17 * 470296;
          s7 += s17 * 654183;
          s8 -= s17 * 997805;
          s9 += s17 * 136657;
          s10 -= s17 * 683901;
          s17 = 0;
  
          s4 += s16 * 666643;
          s5 += s16 * 470296;
          s6 += s16 * 654183;
          s7 -= s16 * 997805;
          s8 += s16 * 136657;
          s9 -= s16 * 683901;
          s16 = 0;
  
          s3 += s15 * 666643;
          s4 += s15 * 470296;
          s5 += s15 * 654183;
          s6 -= s15 * 997805;
          s7 += s15 * 136657;
          s8 -= s15 * 683901;
          s15 = 0;
  
          s2 += s14 * 666643;
          s3 += s14 * 470296;
          s4 += s14 * 654183;
          s5 -= s14 * 997805;
          s6 += s14 * 136657;
          s7 -= s14 * 683901;
          s14 = 0;
  
          s1 += s13 * 666643;
          s2 += s13 * 470296;
          s3 += s13 * 654183;
          s4 -= s13 * 997805;
          s5 += s13 * 136657;
          s6 -= s13 * 683901;
          s13 = 0;
  
          s0 += s12 * 666643;
          s1 += s12 * 470296;
          s2 += s12 * 654183;
          s3 -= s12 * 997805;
          s4 += s12 * 136657;
          s5 -= s12 * 683901;
          s12 = 0;
  
          carry0 = (s0 + (1 << 20)) >> 21; s1 += carry0; s0 -= carry0 << 21;
          carry2 = (s2 + (1 << 20)) >> 21; s3 += carry2; s2 -= carry2 << 21;
          carry4 = (s4 + (1 << 20)) >> 21; s5 += carry4; s4 -= carry4 << 21;
          carry6 = (s6 + (1 << 20)) >> 21; s7 += carry6; s6 -= carry6 << 21;
          carry8 = (s8 + (1 << 20)) >> 21; s9 += carry8; s8 -= carry8 << 21;
          carry10 = (s10 + (1 << 20)) >> 21; s11 += carry10; s10 -= carry10 << 21;
  
          carry1 = (s1 + (1 << 20)) >> 21; s2 += carry1; s1 -= carry1 << 21;
          carry3 = (s3 + (1 << 20)) >> 21; s4 += carry3; s3 -= carry3 << 21;
          carry5 = (s5 + (1 << 20)) >> 21; s6 += carry5; s5 -= carry5 << 21;
          carry7 = (s7 + (1 << 20)) >> 21; s8 += carry7; s7 -= carry7 << 21;
          carry9 = (s9 + (1 << 20)) >> 21; s10 += carry9; s9 -= carry9 << 21;
          carry11 = (s11 + (1 << 20)) >> 21; s12 += carry11; s11 -= carry11 << 21;
  
          s0 += s12 * 666643;
          s1 += s12 * 470296;
          s2 += s12 * 654183;
          s3 -= s12 * 997805;
          s4 += s12 * 136657;
          s5 -= s12 * 683901;
          s12 = 0;
  
          carry0 = s0 >> 21; s1 += carry0; s0 -= carry0 << 21;
          carry1 = s1 >> 21; s2 += carry1; s1 -= carry1 << 21;
          carry2 = s2 >> 21; s3 += carry2; s2 -= carry2 << 21;
          carry3 = s3 >> 21; s4 += carry3; s3 -= carry3 << 21;
          carry4 = s4 >> 21; s5 += carry4; s4 -= carry4 << 21;
          carry5 = s5 >> 21; s6 += carry5; s5 -= carry5 << 21;
          carry6 = s6 >> 21; s7 += carry6; s6 -= carry6 << 21;
  