C1111233131211111211113313331333133313331313221131211113313232223332321   >>    C111123313121111121111331333133313331333131322113121111331323222333232   <<    C1111233131211111211113313331333133313331313221131211113313232223332323   >>      C1111233131211111211113313331333133313331313221131211113313232223332322   >>