The Matrix - Ploblem O1

import java.util.Scanner;

public class TheMatrix {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder input = new StringBuilder(scanner.nextLine());
        String command;
        while (!"  ".equals(command = scanner.nextLine())) {
            String[] type = command.split("");
            switch (type[0]) {
                case "  ":
                    break;
                case "  ":
                    break;
                case "  ":
                    break;
            }
        }
        System.out.println("" + input);
    }
}