C1111233131211111211113313331333133313331313331333133313221232313112111   >>    C111123313121111121111331333133313331333131333133313331322123231311211   <<    C1111233131211111211113313331333133313331313331333133313221232313112113   >>      C1111233131211111211113313331333133313331313331333133313221232313112112   >>