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
import os
def gcd(a,b):
 if b==0:
  return a
 else:
  return gcd(b,a%b)

def ratio(a,b):
 num=a
 den=b
 div = gcd(num, den)
 if div > 1:
     num =num / div
     den =den / div
 if den == 1:
     return str(num)
 return '%d/%d' % (num,den)


Y,W=map(int,raw_input().split(" "))
bigger=max(Y,W)
number=6-bigger+1
result=ratio(number,6)
if result==0:
    print "0/1"
elif result==1:
    print "1/1"
else:
    print result
