/* 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
	{
		HashMap<String,ArrayList<String>> map = new HashMap<>();
 
        map.put("a", new ArrayList<String>(Arrays.asList("one")));
        map.get("a").add("two");
 
        System.out.println(map);
	}
}

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