Missing Controller

Error: Letras.phpController could not be found.

Error: Create the class Letras.phpController below in file: app/controllers/letras.php_controller.php

<?php
class Letras.phpController extends AppController {

	var $name = 'Letras.php';
}
?>

Notice: If you want to customize this error message, create app/views/errors/missing_controller.ctp