import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class Names {
    private List<String> names = new ArrayList<>();

    public void init() {
        names.add("Bogdanov");
        names.add("Pierscien");
        names.add("Rozpi");
        names.add("String");
    }

    public void choose() {
        Random random = new Random();
        int index = random.nextInt(names.size());
        System.out.println(names.get(index));
        names.remove(index);
    }

    public static void main(String[] args) {
        Names names = new Names();
        names.init();
        int size = names.names.size();
        for(int i = 0; i < size; i++) {
            names.choose();
        }
        System.out.println(names.names.size());
    }
}