Each column is represented by a colour (red, yellow, blue and silver) and each one contains four numbers from a selection of 20.
http://www.prepody.ru/topic59640.html
https://mmomakemoneyonline.net/threads/ ... ok.501295/
http://qrfonline.qrfmag.com/qrfswap/vie ... p?t=129967
https://debate.socialism.nl/forum/showt ... tid=178643
http://forum3.bandingklub.cz/viewtopic. ... &t=1309447
http://oldsite.giessen46ers.de/fantalk/ ... 1&t=201976
http://forum.fretky.cz/info-f46/hoe-con ... 74472.html
http://881.cz/forum.php?mod=viewthread&tid=33769&extra=
http://www.lada-xray.net/showthread.php ... post148327
http://www.prepody.ru/topic38124.html
https://gravatar.com/buttery059f5b9dbc
http://miweii.com/forum.php?mod=viewthr ... 852&extra=
http://www.prepody.ru/topic60704.html
