-ic a-a a-c a-i a-t aaa aac aai aao aar aat aax ac- aca acc aci aco acr act acx ai- aia aic aii aio air ait aix aoa aoc aoi aoo aor aot aox ar- ara arc ari aro arr art arx at- ata atc ati ato atr att atx ax- axa axi axo axr axt axx c-- caa cac cai cao car cat cax cca ccc cci cco ccr cct ccx ci- cia cic cii cio cir cit cix co- coa coc coi coo cor cot cox cra crc cri cro crr crt crx cta ctc cti cto ctr ctt ctx cxc cxi cxo cxr cxt cxx ia- iaa iac iai iao iar iat ica icc ici ico icr ict iia iic iii iio iir iit iix io- ioa ioc ioi ioo ior iot ir- ira irc iri iro irr irt irx ita itc iti ito itt itx ixc ixi o-i oaa oac oai oao oar oat oax oc- oca occ oci oco ocr oct ocx oia oic oii oio oir oit oo- ooa ooc ooi ooo oor oot oox or- ora orc ori oro orr ort orx ot- ota otc oti oto otr ott ox- oxa oxc oxi oxo oxt oxx ra- raa rac rai rao rar rat rax rca rcc rci rco rcr rct rcx ria ric rii rio rir rit rix roa roc roi roo ror rot rox rra rrc rri rrr rrt rta rtc rti rto rtr rtt rtx rxr t-x taa tac tai tao tar tat tax tca tcc tci tco tcr tct tcx tia tic tii tio tir tit tix to- toa toc toi too tor tot tox tra trc tri tro trr trt trx tta ttc tti tto ttr ttt ttx txi txt xaa xac xar xat xci xcr xcx xia xic xii xio xit xix xoa xoc xoi xoo xor xot xox xrc xrt xrx xtc xti xtr xtx xxi xxo xxx