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):
    i1=1
    for i in range(1,min(a,b)+1):
        if a%i==0 and b%i==0:
            i1=i
    return i1
a,b=map(int,input().split())
c1=max(a,b)
c=0
for i in range(c1,7):
    c+=1
if c==0:
    print('0/1')
else:
    x=6//(gcd(c,6))
    c=c//(gcd(c,6))
    print(str(c)+'/'+str(x))
