use strict;
use warnings;
use List::Util 'shuffle';

while (<DATA>) {
    my @newline = split(/\b/);
    for my $word (@newline) {
        my $first = "";
        my $rem = "";
        my $middle = "";
        my $last = "";
        ($first, $rem)  = split /(?<=\b\w)/, $word;
        ($middle, $last) = split /(?=(\w'\w+|\w)$)/, $rem;
        ((length $middle) == 2) ? $middle = reverse $middle :
        ($middle = join "", shuffle(split //, $middle));
         print "$first$middle$last";
    }
}