c:\@Work\Perl\monks>perl -wMstrict -le
"my %xlation = qw(
   one 1  two   2  three 3  four 4  five 5
   six 6  seven 7  eight 8  nine 9  ten 10
   thirty 30  thirtyone 31  thirtytwo 32
   );
 ;;
 my %chapters = (
   'Chapter One'   => 'There were lots of monkeys ...',
   'Chapter Nine'  => 'This chapter has probably 1000 words.',
   'Chapter   two' => 'Here is the text in the second chapter...',
   'Chapter Thirty-one' => 'Every chapter is of differing length.',
   'Chapter Five'  => qq{A chapter can have\nlots and lots\nof lines.},
   );
 ;;
 my @ordered_chapters =
   map  undecorate($_),
   sort
   map  decorate($_),
   keys %chapters
   ;
 ;;
 my @book = map qq{-: $_ :-\n$chapters{$_}}, @ordered_chapters;
 ;;
 print for @book;
 ;;
 exit;
 ;;
 ;;
 sub decorate {
   my ($chapter) = @_;
   ;;
   my $rx_c_num = qr{ [[:alpha:]] [-[:alpha:]]+ [[:alpha:]] }xms;
   ;;
   my ($n_chapt) =
   $chapter =~ m{ \A Chapter \s+ ($rx_c_num) \z }xmso
   or die qq{malformed chapter: '$chapter'};
   ;;
   $n_chapt = normalize_n_chapt($n_chapt);
   ;;
   exists $xlation{$n_chapt} or die qq{unnumbered: '$chapter'};
   ;;
   return pack 'n a*', $xlation{$n_chapt}, $chapter;
   }
 ;;
 sub undecorate { return unpack 'x[n] a*', $_[0]; }
 ;;
 sub normalize_n_chapt {
   my ($n_chapt) = @_;
   ;;
   $n_chapt =~ s{ - }{}xmsg;
   return lc $n_chapt;
   }
"
-: Chapter One :-
There were lots of monkeys ...
-: Chapter   two :-
Here is the text in the second chapter...
-: Chapter Five :-
A chapter can have
lots and lots
of lines.
-: Chapter Nine :-
This chapter has probably 1000 words.
-: Chapter Thirty-one :-
Every chapter is of differing length.