10. Predicate Party!

import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
import java.util.function.BiPredicate;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        List<String> names = Arrays.stream(scan.nextLine().split("\\s+")).collect(Collectors.toList());

        String input = scan.nextLine();
        while (!"Party!".equals(input)) {
            BiPredicate<String, String> predicate = null;
            String[] tokens = input.split("\\s+");
            String command = tokens[1];
            switch (command) {
                case "StartsWith":
                    predicate = (n, s) -> n.startsWith(s);
                    break;
                case "EndsWith":
                    predicate = (n, e) -> n.endsWith(e);
                    break;
                case "Length":
                    predicate = (n, l) -> {
                        int len = Integer.parseInt(l);
                        return n.length() == len;
                    };
                    break;
            }

            String removeOrDouble = tokens[0];
            if ("Double".equals(removeOrDouble)) {
                int startSize = names.size();
                for (int i = 0; i < startSize; i++) {
                    if (predicate.test(names.get(i), tokens[2])) {
                        names.add(names.get(i));
                    }
                }
            } else if ("Remove".equals(removeOrDouble)) {
                for (int i = 0; i < names.size(); i++) {
                    if (predicate.test(names.get(i), tokens[2])) {
                        names.remove(i);
                        i--;
                    }
                }
            }

            input = scan.nextLine();
        }

        names = names.stream().sorted((n1, n2) -> n1.compareTo(n2)).collect(Collectors.toList());
        if (names.size() == 0) {
            System.out.println("Nobody is going to the party!");
        } else {
            System.out.printf("%s are going to the party!",names.toString().replaceAll("\\[|]", ""));
        }
    }
}