eton kadzie si na styku pomidzy czterema liczbami.
http://www.prepody.ru/topic46299.html
https://waselplatform.org/blog/index.php?entryid=968606
https://neoternia.net/viewtopic.php?t=370942
https://waselplatform.org/blog/index.php?entryid=990672
https://www.yunpan.club/forum.php?mod=viewt...9056&extra=
https://ufr-2020.front5.picapo.net/forums/v....php?pid=433788
http://aficionado.pl/showthread.php?484460...-2&p=526186
http://881.cz/forum.php?mod=viewthread&...5837&extra=
https://forum.tjkt.smkyasmida.sch.id/viewtopic.php?t=322036
http://www.lada-xray.net/showthread.php?p=139855#post139855
https://ebagcilar.com/forum/index.php?topic=108238.new#new
https://refugeesfog.com/viewtopic.php?t=142262