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

Y, W = list(map(int, input().strip().split()))
highest = max(Y, W)

num = 0
for i in range(1, 6 + 1):
    if i >= highest:
        num += 1

if num == 0:
    print('0/1')
elif num == 6:
    print('1/1')
elif num == 2:
    print('1/3')
elif num == 3:
    print('1/2')
elif num == 4:
    print('2/3')
else:
    print('{}/{}'.format(num, 6))
