<?php
$a[0][0] = 0; 
$a[0][1] = 1; 
$a[0][2] = 2; 
$a[1][0] = 3; 
$a[1][1] = 4; 
$a[1][2] = 5; 
$a[2][3] = 6; 
$a[2][4] = 7; 
$a[2][5] = 8; 
$a[3][0] = 9; 
$a[4][0] = 10; 
$a[4][1] = 11;

echo end(end($a));



?>

11