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 __future__ import print_function
import sys 
srci = sys.stdin

w, y = map(int, srci.readline().rstrip().split())
mx = max(w, y)
raw_chance = 6 - mx + 1 
dom = 6 

if raw_chance % 2 == 0:
    raw_chance = raw_chance / 2;
    dom = dom / 2 

if raw_chance % 3 == 0:
    raw_chance = raw_chance / 3;
    dom = dom / 3 

print("{0}/{1}".format(raw_chance, dom))
