/* package whatever; // don't place package name! */
 
import java.util.*;
import java.util.stream.*;
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> list1 = Arrays.asList("A", "XYZ", "AXTU");
		List<Integer> list2 = Arrays.asList(2, 4, 6);
		Stream<Object> stream = Stream.concat(list1.stream(), list2.stream());
    	System.out.println(stream.sorted((Object o1, Object o2) -> {
    		return (o1 instanceof String ? 2*((String)o1).length() : 1+2*(Integer)o1)
    			- (o2 instanceof String ? 2*((String)o2).length() : 1+2*(Integer)o2);
		}).collect(Collectors.toList()));
	}
}

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