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() {
  int y, w, t, a = 1, b = 6;
  scanf("%d %d", &y, &w);
  if (y >= w)
    t = 6 - y + 1;
  else
    t = 6 - w + 1;
  switch (t) {
    case 6:
      b = 1;
      break;
    case 5:
    case 1:
      a = t;
      break;
    case 4:
    case 2:
      a = t / 2;
      b = b / 2;
      break;
    case 3:
      b = b / t;
      break;
  }
  printf("%d/%d\n", a, b);
  return 0;
}
