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;
void fast() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
}
void mysol() {
  long long a, b;
  cin >> a >> b;
  long long prob = 6 - max(a, b) + 1;
  if (prob % 6 == 0)
    cout << prob / 6 << '/' << 6 / 6;
  else if (prob % 2 == 0)
    cout << prob / 2 << '/' << 6 / 2;
  else if (prob % 3 == 0)
    cout << prob / 3 << '/' << 6 / 3;
  else
    cout << prob << '/' << 6;
}
int32_t main() {
  fast();
  { mysol(); }
  return 0;
}
