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

i = raw_input()
j = i.split(" ")
values = [int(a) for a in j]

biggest = 0

if values[0] > values[1]:
    biggest = values[0]
else:
    biggest = values[1]

probability = 7
probability = 7-biggest

divisor = 6

while probability % 2 == 0:
    probability = probability/2
    divisor = divisor/2

while probability % 3 == 0:
    probability = probability/3
    divisor = divisor/3

while probability % 6 == 0:
    probability = probability/6
    divisor = divisor/6

print(str(probability)+"/"+str(divisor))

 	 	 						  	    	 					 	 		