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
import math
input = sys.stdin.readline

def int_array():
	return list(map(int, input().strip().split()))
def str_array():
	return input().strip().split()

maxi = max(int_array())
maxi = 6 - maxi + 1
if maxi == 2:
	print("1/3")
elif maxi == 3:
	print("1/2")
elif maxi == 4:
	print("2/3")
elif maxi == 6:
	print("1/1")
elif maxi == 0:
	print("0")
else:
	print(f"{maxi}/6")



