import java.util.Scanner;
public class Main{
public static void main(String args[]){
Scanner scanner=new Scanner(System.in);
int a=scanner.nextInt();
int b=scanner.nextInt();
System.out.printf("%d %d",b,a);
}
public class Main{
public static void main(String args[]){
Scanner scanner=new Scanner(System.in);
int a=scanner.nextInt();
int b=scanner.nextInt();
System.out.printf("%d %d",b,a);
}
}
这个题目很基础