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

l=[]
d,w=input().split()
l.append(int(d))
l.append(int(w))
i=max(l)
p=6-i+1
if(p==6):
    print(f"{1}/{1}")
elif(p==0):
    print(f"{0}/{1}")
else:
    if(p%2==0 and p%3==0):
        p=p//3
        t=6//3
        print(f"{p}/{t}")
    elif(p%2==0):
        p=p//2
        t=6//2
        print(f"{p}/{t}")
    elif(p%3==0):
        p=p//3
        t=6//3
        print(f"{p}/{t}")
    else:
        print(f"{p}/{6}")
    