import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int a = 0;
int b = 0;
while (in.hasNext()) {
a = in.nextInt();
b = in.nextInt();
}
System.out.println(b + "\n" + a);
}
}