пожалуйста
package com.javarush.task.task07.task0717;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
/*
Удваиваем слова
*/
public class Solution {
public static void main(String[] args) throws Exception {
ArrayList<String> list = new ArrayList<String>();
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
for(int y=0;y<10;y++){
String s = reader.readLine();
list.add(s);
}
ArrayList<String> result = doubleValues(list);
for (String i : result) {
System.out.println(i);
}
public static ArrayList<String> doubleValues(ArrayList<String> list) {
String e=list()+","+list();
return e;
}
}