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 math

def irr(c):
	d = int(math.gcd(c, 6))
	x = int(c/d)
	y = int(6/d)
	res = [x, y]
	return res

a, b = input().split()
a = int(a)
b = int(b)
c = 7 - max(a, b)
if c == 0:
	print("0/1")
elif c == 6:
	print("1/1")
else:
	res = irr(c)
	print(str(res[0]) + "/" + str(res[1]))
