/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		List<String> list = Arrays.asList(("zero\n"
                + "test0\n"
                + "one\n"
                + "test1\n"
                + "two\n"
                + "test2").split("\n"));
        LinkedHashMap<String, String> linked = new LinkedHashMap<>();
        for (int i = 0; i < list.size(); i += 2) {
            linked.put(list.get(i), list.get(i + 1));
        }

        linked.forEach((k, v) -> System.out.println(k + ":" + v));
	}
}