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

# To change this template, choose Tools | Templates
# and open the template in the editor.
__author__="yaroslav"
__date__ ="$02.08.2011 18:00:13$"
if __name__ == "__main__":
    y,w = map(int,raw_input().rsplit())
    max1 = max(y,w)
    if max1 == 6:
        print "1/6"
    elif max1 == 5:
        print "1/3"
    elif max1 == 4:
        print "1/2"
    elif max1 == 3:
        print "2/3"
    elif max1 == 2:
        print "5/6"
    elif max1 == 1:
        print "1/1"