03. Stream Of Letters

import java.util.Scanner;

public class StreamOfLetters {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder word = new StringBuilder();
        StringBuilder message = new StringBuilder();
        int c = 0, o = 0, n = 0;

        String input;
        while (!(input = scanner.nextLine()).equals("End")) {
            char letter = input.charAt(0);

            if (letter >= 'A' && letter <= 'Z' || letter >= 'a' && letter <= 'z') {
                if (letter == 'c' && c == 0) {
                    c++;
                } else if (letter == 'o' && o == 0) {
                    o++;
                } else if (letter == 'n' && n == 0) {
                    n++;
                } else {
                    word.append(letter);
                }

                if (c == 1 && o == 1 && n == 1) {
                    c--; o--; n--;
                    message.append(" ").append(word);
                    word = new StringBuilder();
                }
            }
        }

        System.out.println(message.toString());
    }
}