package main

import "fmt"

func main() {
	var N int
	fmt.Scan(&N)
	S := make([]string, N)
	T := make([]string, N)
	var ans int
	for i := 0; i < N; i++ {
		fmt.Scan(&S[i])
	}
	for i := 0; i < N; i++ {
		fmt.Scan(&T[i])
		if S[i] != T[i] {
			ans = i
		}
	}
	fmt.Println(ans + 1)
	fmt.Println(S[ans])
	fmt.Println(T[ans])
}