-ic a-a a-c a-i a-t aaa aac aai aar aat aax ac- aca acc aci acr act acx ai- aia aic aii air ait aix ar- ara arc ari arr art arx at- ata atc ati atr att atx ax- axa axi axr axt axx c-- caa cac cai car cat cax cca ccc cci ccr cct ccx ci- cia cic cii cir cit cix cra crc cri crr crt crx cta ctc cti ctr ctt ctx cxc cxi cxr cxt cxx ia- iaa iac iai iar iat ica icc ici icr ict iia iic iii iir iit iix ir- ira irc iri irr irt irx ita itc iti itt itx ixc ixi ra- raa rac rai rar rat rax rca rcc rci rcr rct rcx ria ric rii rir rit rix rra rrc rri rrr rrt rta rtc rti rtr rtt rtx rxr t-x taa tac tai tar tat tax tca tcc tci tcr tct tcx tia tic tii tir tit tix tra trc tri trr trt trx tta ttc tti ttr ttt ttx txi txt xaa xac xar xat xci xcr xcx xia xic xii xit xix xrc xrt xrx xtc xti xtr xtx xxi xxx