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

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

    n = max(Y, W)

    P = {1: [],
         2: [2],
         3: [3],
         4: [2, 2],
         5: [5],
         6: [2, 3]}

    numer = P[6-n+1][:]
    denom = P[6][:]

    new_numer = []
    for n in numer:
        if n in denom:
            denom.remove(n)
        else:
            new_numer.append(n)

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

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

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