use 5.38.0;

package Part1;

use List::AllUtils qw/ sum /;

sub extract_number ($line) {
    my @n = $line =~ /(\d)/g;
    return join "", $n[0], $n[-1];
}

sub solution_1 ($input) {
    sum map { extract_number($_) } split "\n", $input;
}

1;