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

##__________________________________________________________________
##
## Author:      GogolGrind
##__________________________________________________________________

from sys import *
from math import *

def main ():
   m = 6
   x,y = list(map(int,input().split()))
   x = max(x,y)
   y = 0
   gcd = lambda a,b: b if a == 0 else gcd(b % a,a)
   for i in range(1,7):
      if i >= x:
         y += 1
   z = gcd(y,m)
   if z == 0:
      print('0/1')
   else:
      print ( str(y//z) + '/' + str(m//z))
if __name__ == '__main__':
    main()
