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 gcd(int x, int y) {
  while (x != y) {
    if (x > y)
      x = x - y;
    else if (x == 0) {
      return y;
    } else if (y == 0) {
      return x;
    } else
      y = y - x;
  }
  return x;
}
int main() {
  int y, w;
  cin >> y >> w;
  int n = 6 - (max(y, w)) + 1;
  int n6 = 6;
  int e = gcd(n, n6);
  cout << n / e << "/" << n6 / e << endl;
  return 0;
}
