a,b = map(int, raw_input().split())
n = a-b
count = 0
while n!=0:
	if n == 10:
		print 11*(10**count)
		n = 0
	elif n%10 == 0:
		n = n/10
		count += 1
	else:
		print (n-1)*(10**count)
		n = 0