12
 1378
 51202278
 989898989
 4
 7
 9
 6
 8
 12193721
 999999995
 999999999
 11
 999999996
 999999998
 3
 14
 15
 10
 999999994
 1000
 13781378
 5
 999999997
 1000000000
 13
 16
 0

6
 4
 4
 8
 6
 2
 8
 4
 6
 8
 2
 2
 2
 6
 4
 2
 4
 2
 4
 4
 6
 4
 8
 8
 6
 8
 6
 1

#include <bits/stdc++.h>
int main() {
  int n, a = 8, b, d, i;
  int c = 8;
  scanf("%d", &n);
  if (n == 0)
    printf("1");
  else {
    if (n % 4 == 0)
      printf("6");
    else {
      b = (n % 4) - 1;
      for (i = 0; i < b; i++) {
        c *= 8;
      }
      d = c % 10;
      printf("%d", d);
    }
  }
  return 0;
}
