chinamox,

You're extremely close. Now all you have to do is loop over @simpson_age, and use the value from that array as the key to your age hash. (Similar, but not exactly like, you're using $a and $b in your sort subroutine.)

s**lil*;  $*=join'',sort split q**;  s;.*;grr; &&s+(.(.)).+$2$1+; $; =
qq-$_-;s,.*,ahc,;$,.=chop for split q,,,reverse;print for($,,$;,$*,$/)
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