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

def prime_factorize(n):
    """Compute the prime factorization of a number

    Parameters
    ----------
    n : an int less than or equal to 6

    """
    return set(d for d in range(2, 6) if n % d == 0)

if __name__ == '__main__':
    Y, W = [int(num) for num in raw_input().split()]

    n = max(Y, W)

    numer = prime_factorize(6-n + 1)
    denom = {2, 3}

    shared = numer & denom
    numer -= shared
    denom -= shared

    numer_prod = 1
    for n in numer:
        numer_prod *= n

    denom_prod = 1
    for d in denom:
        denom_prod *= d

    print '{}/{}'.format(numer_prod, denom_prod)
