class Logger:
    def log_error(self, message: str) -> None:
        print(f"ERROR: {message}")
    def log_info(self, message: str) -> None:    
        print(f"INFO: {message}")
    def log_debug(self, message: str) -> None:
        print(f"DEBUG: {message}")
    def log_warning(self, message: str) -> None:
        print(f"WARNING: {message}")