package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	reader := bufio.NewReader(os.Stdin)
	var n int
	fmt.Fscan(reader, &n)

	var s1, s2, s3, val int64

	for i := 0; i < n; i++ {
		fmt.Fscan(reader, &val)
		s1 += val
	}
	for i := 0; i < n-1; i++ {
		fmt.Fscan(reader, &val)
		s2 += val
	}
	for i := 0; i < n-2; i++ {
		fmt.Fscan(reader, &val)
		s3 += val
	}

	fmt.Println(s1 - s2)
	fmt.Println(s2 - s3)
}