Quick question to check PHP 5.3 knowledge

php53-closures-question.php

<?php

$guys[] = "Robert, age 24";
$guys[] = "Alice, age 19";
$guys[] = "Jacob, age 29";

array_walk($guys, function (&$guy) {
  $guy = preg_replace_callback("#^\w{2}\w+#", function($value) {
    $value = current($value);
    for ($i = 2; $i < strlen($value); $i++) {
      $value[$i] = "#";
    }   
    return $value;
  }, $guy);
});

while (list(, $value) = each($guys)) {
  printf("%s\n", $value);
}
//what will be output of above scrip?