First a random technical note. The implementation of
rand guarantees that the same value cannot be returned twice in a very large number of calls. So your note about #2 and #3 is not true. If I'm free to ignore that, I get much smaller entries for those. But I'll submit entries that don't (ab)use that fact about
rand.
Here is my score:
human.pl: 87 strokes
shuffle.pl: 47 strokes
select.pl: 52 strokes
------------------------
total: 186 strokes
Note that you might not accept my human.pl, it does have an artificial (though generous and easy to increase) limit in it. I used no modules. Here are my solutions.
human.pl
========
%x=map{($x=lc)=~s/\d+/0
x(999-length$&).$&/ge;$_,$x}@x=<>;print
sort{$x{$a}cmp$x{$b}}@x
shuffle.pl
==========
$i=rand@x,@x[$n=@x,$i]=($x[$i],$_)for<>;print@x
select.pl
=========
$i=rand@x,@x[$n=@x,$i]=($x[$i],$_)for<>;print@x[0,1]
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