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

#! /usr/bin/env/ python
# coding=utf-8

from fractions import Fraction

y, w = map(int, raw_input().split(' '))


def max_1(a, b):
    if a >= b:
        return a
    else:
        return b


res_1 = Fraction((6 - (max_1(y, w)-1)), 6)
if res_1 == 1:
    print str(res_1)+'/1'
elif res_1 == 0:
    print str(res_1)+'/1'
else:
    print(res_1)