Twin directories of a:

[DIR]  ftp://ftp.netvision.net.il/home/a/
[DIR]  ftp://ftp.gfz-potsdam.de/pub/home/sf/sp/a/
[DIR]  ftp://ftp.mimuw.edu.pl/People/sebek/3060/old/materialy-plytka-SO-2004-cd/strona_www_SO/PUBLIC-SO/2003-04/03_shell/zadanie1-test/a/
[DIR]  ftp://ftp.kemsu.ru/incoming/sinnerKem/unix_video/etc/terminfo/a/
[DIR]  ftp://128.31.0.36/debian-security/pool/updates/main/a/
[DIR]  ftp://128.31.0.36/debian-security/pool/updates/contrib/a/
[DIR]  ftp://ftp.dit.upm.es/linux/ubuntu-6.06.1/ubuntu-6.06.1/pool/main/a/
[DIR]  ftp://ftp.cs.bgu.ac.il/pub/esra/a/
[DIR]  ftp://ftp.linux.it/ubuntu/pool/universe/a/
[DIR]  ftp://ftp.linux.it/ubuntu/pool/main/a/
[DIR]  ftp://ftp.linux.it/ubuntu/pool/multiverse/a/
[DIR]  ftp://ftp.linux.it/debian/pool/main/a/
[DIR]  ftp://ftp.linux.it/debian/pool/non-free/a/
[DIR]  ftp://ftp.linux.it/debian/pool/contrib/a/
[DIR]  ftp://ftp.eutelia.it/pub/Slackware_Mirror/slackware-12.1/slackware/a/
[DIR]  ftp://ftp.eutelia.it/pub/Slackware_Mirror/slackware-12.1/source/a/
[DIR]  ftp://ftp.eutelia.it/pub/Slackware_Mirror/slackware-12.2/source/a/
[DIR]  ftp://ftp.eutelia.it/pub/Slackware_Mirror/slackware-current/slackware/a/
[DIR]  ftp://ftp.eutelia.it/pub/Slackware_Mirror/slackware-current/source/a/
[DIR]  ftp://ftp.eutelia.it/pub/Slackware_Mirror/slackware-11.0/slackware/a/
[DIR]  ftp://ftp.eutelia.it/pub/Slackware_Mirror/slackware-11.0/source/a/
[DIR]  ftp://ftp.eutelia.it/pub/Slackware_Mirror/slackware-12.0/slackware/a/
[DIR]  ftp://ftp.eutelia.it/pub/Slackware_Mirror/slackware-12.0/source/a/
[DIR]  ftp://ftp.cesca.es/mirror/debian-security/pool/updates/main/a/
[DIR]  ftp://ftp.cesca.es/mirror/debian/pool/contrib/a/
[DIR]  ftp://ftp.cesca.es/mirror/debian/pool/main/a/
[DIR]  ftp://ftp.cesca.es/mirror/debian/pool/non-free/a/
[DIR]  ftp://ftp.cesca.es/mirror/debian-security/pool/updates/contrib/a/
[DIR]  ftp://ftp.saintjoe.edu/pub/linux/slackware/slackware-current/slackware/a/
[DIR]  ftp://ftp.saintjoe.edu/pub/linux/slackware/slackware-current/source/a/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors3/debian.org/debian-security/pool/updates/main/a/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors3/debian.org/debian/pool/main/a/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors3/debian.org/debian/pool/non-free/a/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors3/debian.org/debian-security/pool/updates/contrib/a/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors3/debian.org/debian/pool/contrib/a/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors3/backports.org/pool/main/a/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/slackware/slackware/a/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/slackware/source/a/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/debian/pool/main/a/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/debian/pool/non-free/a/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/debian-non-US/pool/non-US/contrib/a/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/debian-non-US/pool/non-US/main/a/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/debian-security/pool/updates/contrib/a/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/debian-security/pool/updates/main/a/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/debian/pool/contrib/a/
[DIR]  ftp://ftp.x.org/contrib/games/multiplayer/flyboy/acm/acm/a/
[DIR]  ftp://161.7.9.173/ft_allocations/collected_2008/a/
[DIR]  ftp://ftp.42.org/pub/OLD/a/
[DIR]  ftp://debian.lcs.mit.edu/pub/debian-amd64/debian-amd64/pool/main/a/
[DIR]  ftp://debian.lcs.mit.edu/pub/debian-amd64/debian-amd64/pool/non-free/a/