6 6
 1 4
 4 4
 3 3
 6 4
 6 3
 5 4
 5 6
 3 4
 1 3
 3 2
 5 5
 1 1
 2 1
 3 1
 3 5
 1 6
 6 5
 2 3
 4 3
 2 2
 3 6
 1 2
 6 1
 2 5
 4 5
 1 5
 6 2
 4 6
 5 1
 4 1
 5 2
 2 4
 2 6
 5 3

1/6
 1/2
 1/2
 2/3
 1/6
 1/6
 1/3
 1/6
 1/2
 2/3
 2/3
 1/3
 1/1
 5/6
 2/3
 1/3
 1/6
 1/6
 2/3
 1/2
 5/6
 1/6
 5/6
 1/6
 1/3
 1/3
 1/3
 1/6
 1/6
 1/3
 1/2
 1/3
 1/2
 1/6
 1/3

#include <bits/stdc++.h>
int main(void) {
  int a, b, c, d, m, i;
  scanf("%d %d", &a, &b);
  if (a > b)
    m = a;
  else
    m = b;
  c = 7 - m;
  if (c == 6)
    printf("%d/%d", 1, 1);
  else if (c % 2 == 0)
    printf("%d/%d", c / 2, 3);
  else if (c % 3 == 0)
    printf("%d/%d", c / 3, 2);
  else
    printf("%d/%d", c, 6);
  return 0;
}
