func main()
	var _: [][]char :: cui@input().split(" ")
	var A: int :: _[0].toInt(&)
	var B: int :: _[1].toInt(&)
	var ans: int :: 3
	for i(23, 25)
		do ans :- A <= i & i <= B ?(1, 0)
	end for
	do cui@print("\{ans}\n")
end func