The general rules for the /pub/pictures part of ftp.sunet.se are as follows:

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[ICO]NameLast modifiedSize

[PARENTDIR]Parent Directory  -
[TXT]gmtrop1.txt1994-05-28 19:42 609
[IMG]gmtrop1.gif1994-05-28 19:43 211K
[IMG]oocys2.jpg1995-02-03 14:25 156K
[TXT]oocys2.txt1995-02-03 14:25 140

Apache/2.4.62 (Unix) Server at ftp.acc.umu.se Port 443