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 stones(lista):
    m = (7- max(lista[0], lista[1])) / 6
    if m == 1/6:
        return '1/6'
    elif m == 1/3:
        return '1/3'
    elif m == 1/2:
        return '1/2'
    elif m == 2/3:
        return '2/3'
    elif m == 5/6:
        return '5/6'
    elif m == 1:
        return '1/1'
    else:                        
        return '0/1'
    
lista = list(map(int, input().rstrip().split()))       
print(stones(lista))