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

input_lines = """4 2"""

recibir = False
i__l = -1

def get_input():
	global i__l
	if not recibir:
		i__l += 1
		return input_lines.splitlines()[i__l]
	return raw_input()

a, b = map(int,get_input().split())

maximo = max(a,b) - 1

total = 6
results = total - maximo
	
numerador =   [1,1,1,2,5,1]	
denominador = [6,3,2,3,6,1]

print str(numerador[results - 1]) + "/" + str(denominador[results - 1])
