#include <stdio.h>
#include <stdlib.h>

int a, b;

void sokr(int a, int b, int step)
{
    int ost0 = a % step;
    int ost1 = b % step;

    if (!ost0 && !ost1)
        sokr(a / step, b / step, 2);
    else if ((ost0 != 0) || (ost1 != 0))
    {
        if ((a > step) && (b > step))
            sokr(a, b, step+1);
    }

    printf("%d/%d\n", a, b);
    exit(0);
}

int main(int argc, char *argv[])
{
    scanf("%d %d", &a, &b);

    int c = (a > b) ? a : b;

    sokr(6 - c + 1, 6, 2);

    return 0;
}