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 w, y;
  cin >> w >> y;
  int num = 6 - max(w, y) + 1;
  if (num == 0)
    cout << "0/1";
  else {
    if (num == 6)
      cout << "1/1";
    else {
      if (num % 2 == 0) cout << num / 2 << "/3";
      if (num % 3 == 0) cout << num / 3 << "/2";
      if (num == 5 || num == 1) cout << num << "/6";
    }
  }
  return 0;
}
