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

import sys


class DieRoll:
    def cal(self,ya, wakko):
        rem = 6 - max(ya,wakko) + 1
        if rem == 6:
            return "1/1"
        elif rem == 5:
            return "5/6"
        elif rem == 4:
            return "2/3"
        elif rem == 3:
            return "1/2"
        elif rem == 2:
            return "1/3"
        elif rem == 1:
            return "1/6"
        else:
            return "0/1"

def main():
    x,y = [int(z) for z in sys.stdin.readline().split()]
    print(DieRoll.cal(DieRoll,x,y))


if __name__ == ("__main__"):
    main()
