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

m, n = input().split()
m = int(m)
n = int(n)

array = [m, n]
array.sort()

numerator = (6 - int(array[1] - 1))
denominator = 6
if m == 1 and n == 1:
	print('1/1')
else:
	if (numerator  % 2 == 0) and (denominator  % 2 == 0):
		print(str(numerator//2) + '/' + str(denominator//2))
	elif (numerator  % 3 == 0) and (denominator  % 3 == 0):
		print(str(numerator//3) + '/' + str(denominator//3))
	else:
		print(str(numerator) + '/' + str(denominator))
