func main()
	var ss: [][]char :: cui@input().split(" ")
	var x: int :: ss[0].toInt(&)
	var y: int :: ss[1].toInt(&)
	var ans: int :: 0
	if(x = y | x * 2 = y)
		do ans :: 4
	elif(x < y & y < x * 2)
		do ans :: 8
	end if
	do cui@print("\{ans}\n")
end func