-ic a-a a-c a-i a-t aaa aac aaf aai aar aat aax ac- aca acc acf aci acr act acx af- afa afc aff afi afr aft afx ai- aia aic aif aii air ait aix ar- ara arc arf ari arr art arx at- ata atc atf ati atr att atx ax- axa axi axr axt axx c-- caa cac caf cai car cat cax cca ccc ccf cci ccr cct ccx cfa cfc cff cfi cfr cft cfx ci- cia cic cif cii cir cit cix cra crc crf cri crr crt crx cta ctc ctf cti ctr ctt ctx cxc cxf cxi cxr cxt cxx faa fac faf fai far fat fax fca fcc fcf fci fcr fct fcx ffa ffc fff ffi ffr fft ffx fia fic fif fii fir fit fix fra frc frf fri frr frt fta ftc ftf fti ftr ftt ftx fxi fxr fxt fxx i-f ia- iaa iac iaf iai iar iat ica icc icf ici icr ict ifa ifc iff ifi ifr ift ifx iia iic iif iii iir iit iix ir- ira irc irf iri irr irt irx ita itc itf iti itt itx ixc ixi ra- raa rac raf rai rar rat rax rca rcc rcf rci rcr rct rcx rfa rfc rff rfi rfr rft ria ric rif rii rir rit rix rra rrc rrf rri rrr rrt rta rtc rtf rti rtr rtt rtx rxr t-x taa tac taf tai tar tat tax tca tcc tcf tci tcr tct tcx tfa tfc tff tfi tfr tft tfx tia tic tif tii tir tit tix tra trc trf tri trr trt trx tta ttc ttf tti ttr ttt ttx txf txi txt xaa xac xaf xar xat xcf xci xcr xcx xfa xft xfx xia xic xii xit xix xrc xrf xrt xrx xtc xtf xti xtr xtx xxi xxx