Ordena a b c erro linha 34 classe ordena.php

<?php
class Ordena
{
    protected $a;
    protected $b;
    protected $c;
    //contrutor//
    /*public function __construct($a,$b,$c){
        $this->a=$aa;
        $this->b=$bb;
        $this->c=$cc;
    }*/
    //metodos especiais//
    public function getA(){
        return $this->a;
    }
    public function setA($aa){
        $this->a=$aa;
    }

    public function getB(){
        return $this->b;
    }
    public function setB($bb){
        $this->b=$bb;
    }

    public function getC(){
        return $this->b;
    }
    public function setC($cc){
        $this->c=$cc;
    }
    //fincao ordena a b c/
    public function ordenador(){
    if($this->a > $this->b & $this->b > $this->c){
        print ("a,b,c");
    }elseif($this->b > $this->c & $this->c > $this->b){
        print("b,c,a");
    }else($this->b > $this->c){
        print("b,a,c");
    }
}


// index

<?php
require 'ordena.php';
$ord = new Ordena();
$ord->setA(3);
$ord->setB(2);
$ord->setC(1);

$ord->ordenador();
//print_r($ord);