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#!/usr/bin/perl
use strict;
use warnings;
...
Still, rrrr makes no sense. 4
Drill for sentences with multiple instances of "are" and "were" regula
+rly. 5
Argh. Right you are, Randy! 4 matches if insensitive (but only 2 match
+ when case sensitive).

        Using tr
There are four "r"s in this sentence. 4
Still, rrrr makes no sense. 4
...
Argh. Right you are, Randy! 4 matches if insensitive but only 2 match 
+when case sensitive.

 and the data is: ....