/* 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
	{
		NavigableMap< String , List< String > > map = new TreeMap<>() ;
		
		map.put( "animals" , List.of( "dog" , "cat" , "bird" ) ) ;
		map.put( "people" , List.of( "Alice" , "Bob" , "Carol" ) ) ;
		map.put( "cars" , List.of( "Honda" , "Mazda" ) ) ;
		
		System.out.println( "map.toString() ➡ " + map ) ;
	}
}