package main

import "fmt"

func inputArray(testCase int, ary *[]string) {
	for i := 0; i < testCase; i++ {
		var val string
		fmt.Scan(&val)
		*ary = append(*ary, val)
	}
}

func searchDifferent(ary1, ary2 []string) {
	for i, v := range ary1 {
		if v != ary2[i] {
			fmt.Printf("%d\n%s\n%s\n", i+1, v, ary2[i])
			break
		}
	}
}

func main() {
	var testCase int
	var ary1, ary2 []string
	fmt.Scan(&testCase)
	inputArray(testCase, &ary1)
	inputArray(testCase, &ary2)
	searchDifferent(ary1, ary2)
}