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

a = []
s = input()
a = s.split()
for i in range(len(a)):
	a[i] = int(a[i])

ma = max(a[0], a[1])
mi = 6-ma+1

def uc(a, b):
	while a != b:
		if a>b:
			mid = b
			b = a-b
			a = mid
		else:
			mid = a
			a = b-a
			b = mid
	return a

print(int(mi/uc(mi, 6)), end = '')
print('/', end = '')
print(int(6/uc(mi, 6)), end = '')