use strict;
use warnings;

open(my $in, '<', 'input.txt')
    or die "Cannot open input.txt: $!";

open(my $out, '>', 'output.txt')
    or die "Cannot open output.txt: $!";

while (<$in>) {
    print $out $_ while s/^\s*\S+\s*//;
}
close($out);
close($in);

##</code><code>##

The person who asked.
can mark one answer.
as "accepted".

Accepting doesn't mean.
it's the best answer,
it just means that it.
worked for the person.
who asked.

##</code><code>##

person who asked.
who asked.
asked.
mark one answer.
one answer.
answer.
"accepted".
doesn't mean.
mean.
the best answer,
best answer,
answer,
just means that it.
means that it.
that it.
it.
for the person.
the person.
person.
asked.