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

import math

x = [int(i) for i in input().split()]
Y = x[0]
W = x[1]

ma = max(Y,W)
ma1 = 6 - ma + 1

def prob(Y,W):
    if Y == 1 and W == 1:
        return "1/1"
    else:
        if math.gcd(ma1,6) == 1:
            return str(ma1) + "/6"
        elif math.gcd(ma1,6) == 2:
            return str(ma1//2) + "/3"
        else:
            return str(ma1//3) + "/2"

print (prob (Y,W))    