aaaa aaac aaap aaca aacc aacp aacu aapa aapc aaup acaa acac acap acca accc accp accu acpa acpu acu- acup apac apap apca apcc appa appc appu apua apuc apup auaa auca aucp aupc caaa caac caap cac- caca cacc capa capc capp capu cauc caup ccaa ccac ccap ccca cccc cccp cccu ccpa ccpp ccuc ccup cpaa cpac cpap cpca cpcu cppa cuau cuca cucc cupp paap paca pacu papa papp paua paup pcaa pcap pcca pccc pcpp ppac ppap ppcc pppa pppp puca pupa pupu puuc uaca uaua ucca uccp ucpa ucua upac upca uppa uppc uppp uppu upup uucp uuuu