class Rover {
  int x;
  int y;
  String direction;

  Rover({required this.x, required this.y, required this.direction});

  void turnLeft() {
    const leftTurns = {
      'N': 'W',
      'W': 'S',
      'S': 'E',
      'E': 'N',
    };
    direction = leftTurns[direction]!;
  }

  void turnRight() {
    const rightTurns = {
      'N': 'E',
      'E': 'S',
      'S': 'W',
      'W': 'N',
    };
    direction = rightTurns[direction]!;
  }

  void moveForward() {
    switch (direction) {
      case 'N':
        y += 1;
        break;
      case 'E':
        x += 1;
        break;
      case 'S':
        y -= 1;
        break;
      case 'W':
        x -= 1;
        break;
    }
  }

  void execute(String commands) {
    for (var i = 0; i < commands.length; i++) {
      final command = commands[i];
      switch (command) {
        case 'L':
          turnLeft();
          break;
        case 'R':
          turnRight();
          break;
        case 'M':
          moveForward();
          break;
      }
    }
  }
}