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

scan = input().split()
Yakko = int(scan[0])
Wakko = int(scan[1])

picked = Yakko if Yakko>=Wakko  else Wakko
a = (6-picked)+1
b = 6
if picked == 1:
    print(str(1)+"/"+"1")
elif a==3 :
    print("1/2")
elif a%2 == 0:
    a//=2
    b//=2
    print(str(a)+"/"+str(b))
else:
    print(str(a)+"/"+str(b))
