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 n, m;
  cin >> n >> m;
  int max, min;
  if (n >= m) {
    max = n;
    min = m;
  } else {
    max = m;
    min = n;
  }
  if (max == 1) {
    cout << '1' << '/' << '1';
  }
  int a = 7 - max;
  int num1 = a, num2 = 6;
  for (int i = min; i < max; i++) {
    if (6 % i == 0 && a % i == 0) {
      num1 = a / i;
      num2 = 6 / i;
    }
  }
  cout << num1 << '/' << num2;
  return 0;
}
