#!/usr/bin/env perl
# Copyright 2023 Síle Ekaterin Liszka
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.

use strict;
use warnings;
use feature qw(:5.36);
use autodie;

open my $fh, '<', 'input.txt';

my $total = 0;

my %map = (
	one => 1,
	two => 2,
	three => 3,
	four => 4,
	five => 5,
	six => 6,
	seven => 7,
	eight => 8,
	nine => 9,
);
for my $i (1..9) {
	$map{$i} = $i;
}

for my $line (<$fh>) {
	chomp $line;
	my $origin = $line;
	my @digits = ();
	while ($line =~ /(one|two|three|four|five|six|seven|eight|nine|\d)/) {
		my $temp = $1;
		my $temp2 = $temp;
		unless ($temp =~ /\d/) {
			$temp2 =~ s/.$//;
		}
		$line =~ s/$temp2//;
		push @digits, $temp;
	}
	my $x = $digits[0];
	my $y = $digits[-1];
	print "found $map{$x} ($x) and $map{$y} ($y)";
	my $z = $map{$x} . $map{$y};
	say ", which is $z, in $origin";
	$total += $z;
}
say $total;