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 main():
	[y, w] = input().split()
	[y, w] = [int(y), int(w)]
	print(calculate(y, w))

def calculate(y, w):
	b = max(y, w)
	if b == 6:
		return "1/6"
	elif b == 5:
		return "1/3"
	elif b == 4:
		return "1/2"
	elif b == 3:
		return "2/3"
	elif b == 2:
		return "5/6"
	elif b == 1:
		return "1/1"

# [y, w] = "4 2".split()
# [y, w] = [int(y), int(w)]
# print(y, w)
main()