-ic a-a a-c a-i a-t aaa aac aai aao aar aas aat aax ac- aca acc aci aco acr acs act acx ai- aia aic aii aio air ais ait aix aoa aoc aoi aoo aor aos aot aox ar- ara arc ari aro arr ars art arx as- asa asc asi aso asr ass ast asx at- ata atc ati ato atr ats att atx ax- axa axi axo axr axs axt axx c-- caa cac cai cao car cas cat cax cca ccc cci cco ccr ccs cct ccx ci- cia cic cii cio cir cis cit cix co- coa coc coi coo cor cos cot cox cra crc cri cro crr crs crt crx csa csc csi cso csr css cst csx cta ctc cti cto ctr cts ctt ctx cxc cxi cxo cxr cxs cxt cxx ia- iaa iac iai iao iar ias iat ica icc ici ico icr ics ict iia iic iii iio iir iis iit iix io- ioa ioc ioi ioo ior ios iot ir- ira irc iri iro irr irs irt irx is- isa isc isi iso isr iss ist ita itc iti ito its itt itx ixc ixi o-i oaa oac oai oao oar oas oat oax oc- oca occ oci oco ocr ocs oct ocx oia oic oii oio oir ois oit oo- ooa ooc ooi ooo oor oos oot oox or- ora orc ori oro orr ors ort orx os- osa osc osi oso osr oss ost osx ot- ota otc oti oto otr ots ott ox- oxa oxc oxi oxo oxt oxx ra- raa rac rai rao rar ras rat rax rca rcc rci rco rcr rcs rct rcx ria ric rii rio rir ris rit rix roa roc roi roo ror ros rot rox rra rrc rri rrr rrs rrt rsa rsc rsi rso rsr rss rst rsx rta rtc rti rto rtr rts rtt rtx rxr rxs saa sac sai sao sar sas sat sax sca scc sci sco scr scs sct scx sia sic sii sio sir sis sit six soa soc soi soo sor sos sot sox sr- sra src sri sro srr srs srt srx ss- ssa ssc ssi sso ssr sss sst ssx sta stc sti sto str sts stt stx sxc sxi sxs sxt t-x taa tac tai tao tar tas tat tax tca tcc tci tco tcr tcs tct tcx tia tic tii tio tir tis tit tix to- toa toc toi too tor tos tot tox tra trc tri tro trr trs trt trx tsa tsc tsi tso tsr tss tst tsx tta ttc tti tto ttr tts ttt ttx txi txs txt xaa xac xar xas xat xci xcr xcx xia xic xii xio xis xit xix xoa xoc xoi xoo xor xos xot xox xrc xrt xrx xsa xsc xsi xss xst xtc xti xtr xts xtx xxi xxo xxx