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 higher(a, b):
    if a > b:
        higher = a
    else:
        higher = b

    return higher

dices = raw_input().split()

first_dice = int(dices[0])
second_dice = int(dices[1])

higher_dice = higher(first_dice, second_dice)

numerator = (7.0 - higher_dice)
denominator = 6

if denominator % numerator == 0:
    denominator /= numerator
    numerator /= numerator
    probability = "%d/%d" % (numerator, denominator)
elif numerator == denominator:
    probability = "1/1"
elif numerator == 0:
    probability = "0/1"
else:
    probability = "%d/%d" % (numerator, denominator)

print probability