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

# -*- coding: utf-8 -*-
import sys
def  max(a,b):
    if a>b:
        return a
    else:
        return b
if __name__ == '__main__':

    list=[]
    num1,num2 = map(int,sys.stdin.readline().split())
    c = max(num1,num2)
    if c == 6:
        print '1/6'
    elif c ==5:
        print '1/3'
    elif c ==4:
        print '1/2'
    elif c ==3:
        print '2/3'
    elif c ==2:
        print '5/6'
    else:
        print '1/1'