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

y, w = map(int, input().split())
#Encontramos el mas grande para ver nums disponibles
mx = max(y,w)
#Dado dot
cant =  6-mx+1

if (cant==6):
  res = "1/1"
elif (cant==0):
  res = "0/1"
elif (cant==1):
  res = "1/6"
elif (cant==2):
  res = "1/3"
elif (cant==3):
  res = "1/2"
elif (cant==4):
  res = "2/3"
elif (cant==5):
  res = "5/6"

print(res)

 			 	     		 			   	   	  		 	