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 gcd(a, b):
    while b > 0:
        a, b = b, a % b
    return a


def brosok(y, w):
    count = 0
    for elem in list(range(1, 7)):
        if elem >= y and elem >= w:
            count += 1
    g = gcd(count, 6)
    if g == 1:
        return str(count) + '/' + str(6)
    else:
        g1 = count // g
        g2 = 6 // g
        return str(g1) + '/' + str(g2)


Y, W = [int(i) for i in input().split()]
print(brosok(Y, W))



