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>
using namespace std;
int main() {
  int a, b, mx;
  cin >> a >> b;
  if (a >= b) {
    mx = a;
  } else {
    mx = b;
  }
  int prob = 1;
  prob += 6 - mx;
  if (prob == 0) {
    printf("0/1\n");
    return 0;
  } else if (prob == 1) {
    printf("1/1\n");
    return 0;
  } else {
    if (prob == 2) {
      printf("1/3");
    }
    if (prob == 3) {
      printf("1/2\n");
    }
    if (prob == 4) {
      printf("2/3\n");
    }
    if (prob == 5) {
      printf("5/6\n");
    }
  }
  return 0;
}
