>>370
できた。perl だ。

$ perl -ne 'chomp;push(@s,$_);if($l<length){$l=length} END{$m=int($l/8)+1;for(@s){print$_.("\t" x ($m-int(length($_)/8)))."IN A localhostのIP\n"}}' test.lst
abc.c0м IN A localhostのIP
defghijk.c0.jρ IN A localhostのIP
123456.nёt IN A localhostのIP
zzz.i0 IN A localhostのIP
$