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):
    if a == b:
        return a
    else:
        ma = 0
        if a > b:
            return gcd(a-b,b)
        else:
            return gcd(b-a,a)
            
a,b = input().split(' ')
a = int(a)
b = int(b)

ma = 0

if a > b:
    ma = a
else:
    ma = b;
num = (int)((7-ma)/(gcd(7-ma,6)))
den = (int)(6/(gcd(7-ma,6)))
print(num,end = "")
print("/",end = "")
print(den)