C1111233131211111211113313331333133313232313331333131133132323221221121   >>    C111123313121111121111331333133313331323231333133313113313232322122112   <<    C1111233131211111211113313331333133313232313331333131133132323221221123   >>      C1111233131211111211113313331333133313232313331333131133132323221221122   >>