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 ==0: return b
    return gcd(b,a%b)
        
def red(a,b):
    t=gcd(a,b)
    a /=t
    b /=t
    return (a,b)

a,b = [int(i) for i in raw_input().split()]
if a == b:
    print '1/1'
elif a > b:        
    d = red(6-a+1,6)
    print str(d[0])+"/"+str(d[1])
else:
    d = red(6-b+1,6)
    print str(d[0])+"/"+str(d[1])
