ftp.ntua.gr:/debian/dists/stretch-updates/non-free/source/Sources.diff/?C=N&O=D 
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[   ] 2021-04-13-2000.50.gz                          13-Apr-2021 23:03   26   
[   ] 2020-06-06-2002.13.gz                          06-Jun-2020 23:02  740
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