#!/usr/local/bin/perl 
open my $FILE, '<', 'rapipago.txt' or die "Cannot open file1.txt: $!";
use strict;
use warnings;
use feature 'say';
while (my $text = <$FILE>) {
    chomp $text;
    my @cums = (0);
	my @offs = ( 17, 6, 31, 3, 3 );
	my @cums = ( 0 );
	push @cums, $_ + $cums[ -1 ] for @offs;
	substr $text, $_, 0, q{-} for reverse @cums[ 1 .. $#cums ];
say $text;
}