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 fac(int x) {
  long long t = 1;
  for (int i = x; i > 1; i--) {
    t *= i;
  }
  return t;
}
long long com(int x, int y) {
  if (x < y) return 0;
  long long t = 1;
  int u = min(x - y, y);
  for (int i = x; i > x - u; i--) {
    t *= i;
  }
  long long p = 1;
  for (int j = 1; j <= u; j++) {
    p *= j;
  }
  return t / p;
}
long long powa(long long x, long long y) {
  long long a = 1;
  for (int i = 0; i < y; i++) {
    a *= x;
  }
  return a;
}
int main() {
  int a, b;
  cin >> a >> b;
  if (max(a, b) == 1)
    cout << 1 << "/" << 1 << endl;
  else {
    if (6 % ((6 - max(a, b)) + 1) == 0)
      cout << 1 << "/" << 6 / ((6 - max(a, b)) + 1) << endl;
    else {
      if (((6 - max(a, b)) + 1) % 2 == 0)
        cout << ((6 - max(a, b)) + 1) / 2 << "/" << 3 << endl;
      else
        cout << ((6 - max(a, b)) + 1) << "/" << 6 << endl;
    }
  }
  return 0;
}
