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

import sys


def get_ints(): return map(int, sys.stdin.readline().strip().split())


def get_list(): return list(map(int, sys.stdin.readline().strip().split()))


y, w = get_ints()

maxy = max(y, w)

w = (6 - y) + 1
y = 6

if w % 2 == 0:
    w = w / 2
    a = 6 / 2
    print(str(int(w)) + "/" + str(int(y)))
elif y % w == 0:
    y = y/w
    w = 1
    print(str(int(w)) + "/" + str(int(y)))
else:
    print("0/0")
	   					  		 		 	   	   	 		