cf 9A

#include<bits\stdc++.h>

using namespace std;

int main()
{
    int a[2];
    for(int i = 0; i < 2; i++) scanf("%d", &a[i]);

    sort(a, a + 2);

    if(7 - a[1] == 1) printf("1/6\n");
    else if(7 - a[1] == 2) printf("1/3\n");
    else if(7 - a[1] == 3) printf("1/2\n");
    else if(7 - a[1] == 4) printf("2/3\n");
    else if(7 - a[1] == 5) printf("5/6\n");
    else if(7 - a[1] == 6) printf("1/1\n");
}