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
# sys.stdin=open("input.in","r")
# sys.stdout=open("output.out","w")

y,w=map(int,input().split())
c=0
for i in range(1,7):
	if(i>=max(y,w)):
		c+=1
if(c==0):
	print('0/6')		
elif(c==1):
	print('1/6')
elif(c==2):
	print('1/3')
elif(c==3):
	print('1/2')	
elif(c==4):
	print('2/3')
elif(c==5):
	print('5/6')
else:
	print('1/1')													