<?php
$string = trim(fgets(STDIN));


function stringToXML($string){
	$list = explode(',', $string);
	echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
	echo '<quiz>' . "\n";
	for($i = 0; $i < count($list); $i+=2){
		echo '  <question>' . "\n";
		echo "    " . trim($list[$i]) . "\n";
		echo '  </question>' . "\n";
		echo '  <answer>' . "\n";
		echo "    " . trim($list[$i+1]) . "\n";
		echo '  </answer>' . "\n";
	}
	echo '</quiz>';
}

stringToXML($string);