import java.util.*;
class  ReplaceLastNames{
    public static void main(String[] args){
        Scanner input=new Scanner(System.in);
        System.out.print("Enter Name1: ");
        String name1=input.nextLine();
        System.out.print("Enter Name2: ");
        String name2=input.nextLine();

        String st1[]=name1.split(" ");
        String st2[]=name2.split(" ");

        String f1=st1[0];
        String l1=st1[1];

        String f2=st2[0];
        String l2=st2[1];

        System.out.println("Names after replacing the last names: ");
        String n1=f1+" "+l2;
        String n2=f2+" "+l1;
        System.out.println(n1);
        System.out.println(n2);
    }
}