func main()
	var a: int :: cui@inputInt()
	var b: int :: cui@inputInt()
	var c: int :: cui@inputInt()
	var d: int :: cui@inputInt()
	
	var ans: int :: ((a - c).abs() + (b - d).abs() <= 3 | a = c | b = d) ?(1, 2)
	do cui@print("\{ans}\n")
end func