Thank you for your note and editors like writers often make mistakes, but with a common effort we can reduce the number of our combined mistakes.<br /><br />I politely ask you to note the following:<a href="http://www.merriam-webster.com/dictionary/youth">http://www.merriam-webster.com/dictionary/youth<br /><br /><em>plural</em>&nbsp;<strong>youths</strong>&nbsp;<input class="au" title="Listen to the pronunciation of youths" type="button" /><span class="pr">\<span class="unicode">?</span>y&uuml;<span style="text-decoration: underline;">th</span>z,&nbsp;<span class="unicode">?</span>y&uuml;ths\</span><br /></a><br />I considered the youth/youths in your text as countable individuals, but I can also see the collective grouping as only "youth."<br /><br />I trust all will go well with your text, as again, we are all doing our best to help the writiers who entrust us with their texts.