You are given strings S and T, consisting of lowercase English letters. It is guaranteed that T is a permutation of the string abc. 

Find string S', the lexicographically smallest permutation of S such that T is not a subsequence of S'.

String a is a permutation of string b if the number of occurrences of each distinct character is the same in both strings.

A string a is a subsequence of a string b if a can be obtained from b by deletion of several (possibly, zero or all) elements.

A string a is lexicographically smaller than a string b if and only if one of the following holds:

  * a is a prefix of b, but a ≠ b;
  * in the first position where a and b differ, the string a has a letter that appears earlier in the alphabet than the corresponding letter in b.

Input

Each test contains multiple test cases. The first line contains a single integer t (1 ≤ t ≤ 1000) — the number of test cases. Description of the test cases follows.

The first line of each test case contains a string S (1 ≤ |S| ≤ 100), consisting of lowercase English letters.

The second line of each test case contains a string T that is a permutation of the string abc. (Hence, |T| = 3).

Note that there is no limit on the sum of |S| across all test cases.

Output

For each test case, output a single string S', the lexicographically smallest permutation of S such that T is not a subsequence of S'.

Example

Input


7
abacaba
abc
cccba
acb
dbsic
bac
abracadabra
abc
dddddddddddd
cba
bbc
abc
ac
abc


Output


aaaacbb
abccc
bcdis
aaaaacbbdrr
dddddddddddd
bbc
ac

Note

In the first test case, both aaaabbc and aaaabcb are lexicographically smaller than aaaacbb, but they contain abc as a subsequence.

In the second test case, abccc is the smallest permutation of cccba and does not contain acb as a subsequence.

In the third test case, bcdis is the smallest permutation of dbsic and does not contain bac as a subsequence.
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;
import java.util.concurrent.ThreadLocalRandom;


public class A {

    static long mod = 1000000007;
    static FastScanner scanner;

    static final StringBuilder result = new StringBuilder();

    public static void main(String[] args) {
        scanner = new FastScanner();
        int T = scanner.nextInt();
        for (int t = 0; t < T; t++) {
            solve(t + 1);
            result.append("\n");
        }
        System.out.println(result);
    }

    static void solve(int tst) {
        String s = scanner.nextLine();
        String t = scanner.nextLine();
        char as[] = s.toCharArray();
        char at[] = t.toCharArray();
        Arrays.sort(as);
        if(t.equals("abc") && s.contains("a")  && s.contains("b") && s.contains("c")){
            // then requires shifting.
            for(int i = 0; i < as.length; i++){
                if(as[i] == 'b')
                    as[i] = 'c';
                else if(as[i] == 'c')
                    as[i] = 'b';
            }
        }
        StringBuilder sb = new StringBuilder();
        for(int i = 0; i < as.length; i++)
            sb.append(as[i]);
        System.out.println(sb);
    }

    static int ask(int a, int b, int c){
        System.out.printf("? %d %d %d",a,b,c);
        System.out.println();
        System.out.flush();
        return scanner.nextInt();
    }

    static class WithIdx implements Comparable<WithIdx> {
        long val, idx;

        public WithIdx(long val, long idx) {
            this.val = val;
            this.idx = idx;
        }

        @Override
        public int compareTo(WithIdx o) {
            if (val == o.val) {
                return Long.compare(idx, o.idx);
            }
            return Long.compare(val, o.val);
        }
    }

    public static class FastScanner {
        BufferedReader br;
        StringTokenizer st;

        public FastScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String nextToken() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        String nextLine() {
            try {
                return br.readLine();
            } catch (Exception e) {
                e.printStackTrace();
                throw new RuntimeException();
            }
        }

        int nextInt() {
            return Integer.parseInt(nextToken());
        }

        long nextLong() {
            return Long.parseLong(nextToken());
        }

        double nextDouble() {
            return Double.parseDouble(nextToken());
        }

        int[] nextIntArray(int n) {
            int[] res = new int[n];
            for (int i = 0; i < n; i++) res[i] = nextInt();
            return res;
        }

        long[] nextLongArray(int n) {
            long[] res = new long[n];
            for (int i = 0; i < n; i++) res[i] = nextLong();
            return res;
        }

        String[] nextStringArray(int n) {
            String[] res = new String[n];
            for (int i = 0; i < n; i++) res[i] = nextToken();
            return res;
        }
    }

    static class PrefixSums {
        long[] sums;

        public PrefixSums(long[] sums) {
            this.sums = sums;
        }

        public long sum(int fromInclusive, int toExclusive) {
            if (fromInclusive > toExclusive) throw new IllegalArgumentException("Wrong value");
            return sums[toExclusive] - sums[fromInclusive];
        }

        public static PrefixSums of(int[] ar) {
            long[] sums = new long[ar.length + 1];
            for (int i = 1; i <= ar.length; i++) {
                sums[i] = sums[i - 1] + ar[i - 1];
            }
            return new PrefixSums(sums);
        }

        public static PrefixSums of(long[] ar) {
            long[] sums = new long[ar.length + 1];
            for (int i = 1; i <= ar.length; i++) {
                sums[i] = sums[i - 1] + ar[i - 1];
            }
            return new PrefixSums(sums);
        }
    }

    static class ADUtils {
        static void sort(int[] ar) {
            Random rnd = ThreadLocalRandom.current();
            for (int i = ar.length - 1; i > 0; i--) {
                int index = rnd.nextInt(i + 1);
                // Simple swap
                int a = ar[index];
                ar[index] = ar[i];
                ar[i] = a;
            }
            Arrays.sort(ar);
        }

        static void reverse(int[] arr) {
            int last = arr.length / 2;
            for (int i = 0; i < last; i++) {
                int tmp = arr[i];
                arr[i] = arr[arr.length - 1 - i];
                arr[arr.length - 1 - i] = tmp;
            }
        }

        static void sort(long[] ar) {
            Random rnd = ThreadLocalRandom.current();
            for (int i = ar.length - 1; i > 0; i--) {
                int index = rnd.nextInt(i + 1);
                // Simple swap
                long a = ar[index];
                ar[index] = ar[i];
                ar[i] = a;
            }
            Arrays.sort(ar);
        }
    }

    static class MathUtils {
        static long[] FIRST_PRIMES = {
                2, 3, 5, 7, 11, 13, 17, 19, 23, 29,
                31, 37, 41, 43, 47, 53, 59, 61, 67, 71,
                73, 79, 83, 89, 97, 101, 103, 107, 109, 113,
                127, 131, 137, 139, 149, 151, 157, 163, 167, 173,
                179, 181, 191, 193, 197, 199, 211, 223, 227, 229,
                233, 239, 241, 251, 257, 263, 269, 271, 277, 281,
                283, 293, 307, 311, 313, 317, 331, 337, 347, 349,
                353, 359, 367, 373, 379, 383, 389, 397, 401, 409,
                419, 421, 431, 433, 439, 443, 449, 457, 461, 463,
                467, 479, 487, 491, 499, 503, 509, 521, 523, 541,
                547, 557, 563, 569, 571, 577, 587, 593, 599, 601,
                607, 613, 617, 619, 631, 641, 643, 647, 653, 659,
                661, 673, 677, 683, 691, 701, 709, 719, 727, 733,
                739, 743, 751, 757, 761, 769, 773, 787, 797, 809,
                811, 821, 823, 827, 829, 839, 853, 857, 859, 863,
                877, 881, 883, 887, 907, 911, 919, 929, 937, 941,
                947, 953, 967, 971, 977, 983, 991, 997, 1009, 1013,
                1019, 1021, 1031, 1033, 1039, 1049, 1051};

        static long[] primes(int to) {
            long[] all = new long[to + 1];
            long[] primes = new long[to + 1];
            all[1] = 1;
            int primesLength = 0;
            for (int i = 2; i <= to; i++) {
                if (all[i] == 0) {
                    primes[primesLength++] = i;
                    all[i] = i;
                }
                for (int j = 0; j < primesLength && i * primes[j] <= to && all[i] >= primes[j];
                     j++) {
                    all[(int) (i * primes[j])] = primes[j];
                }
            }
            return Arrays.copyOf(primes, primesLength);
        }

        static long modpow(long b, long e, long m) {
            long result = 1;

            while (e > 0) {
                if ((e & 1) == 1) {
                    /* multiply in this bit's contribution while using modulus to keep
                     * result small */
                    result = (result * b) % m;
                }
                b = (b * b) % m;
                e >>= 1;
            }

            return result;
        }

        static long submod(long x, long y, long m) {
            return (x - y + m) % m;
        }

        static long modInverse(long a, long m) {
            long g = gcdF(a, m);
            if (g != 1) {
                throw new IllegalArgumentException("Inverse doesn't exist");
            } else {
                // If a and m are relatively prime, then modulo
                // inverse is a^(m-2) mode m
                return modpow(a, m - 2, m);
            }
        }

        static public long gcdF(long a, long b) {
            while (b != 0) {
                long na = b;
                long nb = a % b;
                a = na;
                b = nb;
            }
            return a;
        }
    }
}