package main

import . "fmt"
import . "os"
import bf "bufio"

func main() {
	rd:=bf.NewReader(Stdin)
	var n int
	Fscan(rd,&n)
	t:=map[string]int{}
	for i:=0;i<n;i++ {
		var s string
		Fscan(rd,&s)
		t[s]++
	}
	for i:=0;i<n;i++ {
		var s string
		Fscan(rd,&s)
		t[s]--
	}
	for s,c:=range t {
		if c>0 {
			Println(s)
		}
	}
}