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;
long long mod = 1000000007;
vector<long long> a;
vector<long long> b;
long long m[100001];
long long arr[100001];
void solve() {
  long long a, b, c;
  cin >> a >> b;
  long long mx = 0;
  mx = max(a, b);
  mx = 7 - mx;
  if (mx == 1) {
    cout << "1/6" << endl;
  } else if (mx == 2) {
    cout << "1/3" << endl;
  } else if (mx == 3) {
    cout << "1/2" << endl;
  } else if (mx == 4) {
    cout << "2/3" << endl;
  } else if (mx == 5) {
    cout << "5/6" << endl;
  } else {
    cout << "1/1" << endl;
  }
}
int main() {
  long long t;
  t = 1;
  while (t--) {
    solve();
  }
}
