C1111233131211111211113313331333133313331312331333132212323222323221   >>    C111123313121111121111331333133313331333131233133313221232322232322   <<    C1111233131211111211113313331333133313331312331333132212323222323223   >>      C1111233131211111211113313331333133313331312331333132212323222323222   >>