View Code of Problem 22

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner=new Scanner(System.in);
		while(scanner.hasNext()) {
			char[] nameA=scanner.nextLine().toCharArray();
			char[] nameB=scanner.nextLine().toCharArray();
			List<Character> ans=new ArrayList<>();
			for(int i=0;i<nameA.length;i++) {
				for(int j=0;j<nameB.length;j++) {
					if(nameA[i]==nameB[j]) {
						ans.add(nameA[i]);
						nameB[j]='0';
						nameA[i]='1';
					}
				}
			}
			Collections.sort(ans);
			for(int i=0;i<ans.size();i++) {	
				System.out.print(ans.get(i));
			}
			System.out.println();
		}
	}
}