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() {
  long long i, j, k, l, m, n, c;
  string s;
  vector<int> v;
  map<int, int> mp;
  scanf("%lld %lld", &n, &m);
  k = 6 - max(n, m) + 1;
  if (6 % k == 0)
    printf("1/%lld\n", 6 / k);
  else if (k == 0)
    printf("0/1\n");
  else {
    l = 6;
    if (k % 2 == 0) {
      k = k / 2;
      l = l / 2;
    }
    printf("%lld/%lld\n", k, l);
  }
}
