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

def trial():
    yakko, wakko = list(map(int, input().split()))
    maxi = max([yakko, wakko])
    counter = 0
    for i in range(maxi, 7):
        counter += 1
    if counter == 0:
        return print('0/1')
    if counter == 6:
        return print('1/1')
    if counter < 4:
        total = 6 // counter
        return print(f'1/{total}')
    if counter == 4:
        return print('2/3')
    return print('5/6')
trial()
