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() {
  ios ::sync_with_stdio(0);
  cin.tie(0);
  int y, w, temp, denominator = 6;
  cin >> y >> w;
  if (y == 1 && w == 1) {
    temp = 1;
    denominator = 1;
  } else {
    if (y > w) {
      temp = 6 - y + 1;
      if (temp % 2 == 0) {
        temp /= 2;
        denominator /= 2;
      } else if (temp % 3 == 0) {
        temp /= 3;
        denominator /= 3;
      }
    } else {
      temp = 6 - w + 1;
      if (temp % 2 == 0) {
        temp /= 2;
        denominator /= 2;
      } else if (temp % 3 == 0) {
        temp /= 3;
        denominator /= 3;
      }
    }
  }
  cout << temp << '/' << denominator;
  return 0;
}
