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 == 0 or b == 0:
        return a+b
    else:
        if a-b >= 0:
            return gcd(a-b,b)
        else:
            return gcd(a,b-a)
        
x = input('').split()
a = int(x[0])
b = int(x[1])
m = max(a,b)
options = 7-m
denom = 6
gcd = gcd(options,denom)
no = int((7-m)/gcd)
nd = int(6/gcd)
print(str(no)+'/'+str(nd))