// R38990825 #include <bits/stdc++.h> using namespace std; int main() { int a, b, c; string ans; cin >> a >> b; c = max(a, b); switch (c) { case 1: ans = "1/1"; break; case 2: ans = "5/6"; break; case 3: ans = "2/3"; break; case 4: ans = "1/2"; break; case 5: ans = "1/3"; break; case 6: ans = "1/6"; break; } cout << ans << endl; return 0; }