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

def mdc(n1, n2):
    a = n1
    b = n2

    mod = None
    while mod is not 0:
        mod = a % b
        a  = b
        b  = mod

    return a

entrada = input().split()
a = int(entrada[0])
b = int(entrada[1])

chance = (6-max(a,b))+1
   
aux= mdc(chance,6)
if(chance<=0):
    print("0/1")
else:
    print(str(int(chance/aux))+"/"+str(int(6/aux)))

 		 	 	  		 	  	  						  			