import java.util.Scanner;

public class SimpleShooter {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int playerPosition = 0;
        int bulletPosition = -1;

        while (true) {
            // Clear console
            System.out.print("\033[H\033[2J");
            System.out.flush();

            // Draw game
            for (int i = 0; i < 20; i++) {
                if (i == playerPosition) {
                    System.out.print("P");
                } else if (i == bulletPosition) {
                    System.out.print("B");
                } else {
                    System.out.print("-");
                }
            }
            System.out.println("\nUse 'a' and 'd' to move, 's' to shoot, or 'q' to quit.");

            // User input
            char input = scanner.nextLine().charAt(0);

            if (input == 'a' && playerPosition > 0) {
                playerPosition--;
            } else if (input == 'd' && playerPosition < 19) {
                playerPosition++;
            } else if (input == 's' && bulletPosition == -1) {
                bulletPosition = playerPosition;
            } else if (input == 'q') {
                break;
            }

            if (bulletPosition >= 0) {
                bulletPosition--;
                if (bulletPosition < 0) {
                    bulletPosition = -1;
                }
            }
        }

        System.out.println("Game over!");
    }
}