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

#!/bin/python3
"""
PROBLEM LINK: http://codeforces.com/contest/9/problem/A
"""

from fractions import Fraction

def getChance(y, w):
    DICE_NUM = 6   
    biggestPoint = y if y > w else w
    chance = Fraction(DICE_NUM - biggestPoint + 1, DICE_NUM)
    return chance if chance != 1 else "1/1"

        

if __name__ == '__main__':

    first_multiple_input = input().rstrip().split()

    y = int(first_multiple_input[0])

    w = int(first_multiple_input[1])

    result = getChance(y, w)
    print(result)
