func main()
	var n: int :: cui@inputInt()

	var b: [][]char :: #[n][]char
	var dic: dict<[]char, int> :: #dict<[]char, int>
	for i(0, n - 1)
		var a: []char :: cui@inputStr()
		do b[i] :: cui@inputStr()
		do dic.add(a, 0)
	end for
	for i(0, n - 1)
		if(!dic.exist(b[i]))
			do cui@print(b[i] ~ "\n")
			do dic.add(b[i], 0)
		end if
	end for
end func