-ic a-a a-c a-i a-t aaa aac aae aai aas aat aax ac- aca acc ace aci acs act acx aea aec aee aei aes aet aex ai- aia aic aie aii ais ait aix as- asa asc ase asi ass ast asx at- ata atc ate ati ats att atx ax- axa axe axi axs axt axx c-- caa cac cae cai cas cat cax cca ccc cce cci ccs cct ccx ce- cea cec cee cei ces cet cex ci- cia cic cie cii cis cit cix csa csc cse csi css cst csx cta ctc cte cti cts ctt ctx cxc cxi cxs cxt cxx eaa eac eae eai eas eat eax ec- eca ecc ece eci ecs ect ecx eea eec eee ees eet eex eia eic eie eii eis eit eix es- esa esc ese esi ess est esx eta etc ete eti ets ett etx ex- exa exc exe exi exs ext exx ia- iaa iac iae iai ias iat ica icc ice ici ics ict ie- iea iec iee iei ies iet iex iia iic iie iii iis iit iix is- isa isc ise isi iss ist ita itc ite iti its itt itx ixc ixe ixi saa sac sae sai sas sat sax sca scc sce sci scs sct scx se- sea sec see sei ses set sex sia sic sie sii sis sit six ss- ssa ssc sse ssi sss sst ssx sta stc ste sti sts stt stx sxc sxi sxs sxt t-x taa tac tae tai tas tat tax tca tcc tce tci tcs tct tcx te- tea tec tee tei tes tet tex tia tic tie tii tis tit tix tsa tsc tse tsi tss tst tsx tta ttc tte tti tts ttt ttx txe txi txs txt xaa xac xas xat xci xcx xee xes xet xex xia xic xie xii xis xit xix xsa xsc xsi xss xst xtc xti xts xtx xxi xxx