-ic a-a a-c a-i a-t aaa aac aai aap aar aat aax ac- aca acc aci acp acr act acx ai- aia aic aii aip air ait aix ap- apa apc api app apr apt apx ar- ara arc ari arp arr art arx at- ata atc ati atp atr att atx ax- axa axi axp axr axt axx c-- caa cac cai cap car cat cax cca ccc cci ccp ccr cct ccx ci- cia cic cii cip cir cit cix cpa cpc cpi cpp cpr cpt cpx cra crc cri crp crr crt crx cta ctc cti ctp ctr ctt ctx cxc cxi cxp cxr cxt cxx ia- iaa iac iai iap iar iat ica icc ici icp icr ict iia iic iii iip iir iit iix ipa ipc ipi ipp ipr ipt ipx ir- ira irc iri irp irr irt irx ita itc iti itp itt itx ixc ixi p-p paa pac pai pap par pat pax pca pcc pci pcp pcr pct pcx pia pic pii pip pir pit pix ppa ppc ppi ppp ppr ppt ppx pra prc pri prp prr prt prx pt- pta ptc pti ptp ptr ptt ptx pxc pxr pxt ra- raa rac rai rap rar rat rax rca rcc rci rcp rcr rct rcx ria ric rii rip rir rit rix rpa rpc rpi rpp rpr rpt rpx rra rrc rri rrp rrr rrt rta rtc rti rtp rtr rtt rtx rxp rxr t-x taa tac tai tap tar tat tax tca tcc tci tcp tcr tct tcx tia tic tii tip tir tit tix tpa tpc tpi tpp tpr tpt tpx tra trc tri trp trr trt trx tta ttc tti ttp ttr ttt ttx txi txt xaa xac xap xar xat xci xcp xcr xcx xia xic xii xit xix xpa xpc xpp xpt xrc xrt xrx xtc xti xtp xtr xtx xxi xxp xxx