-er -ic a-a a-c a-i a-t aaa aac aae aai aao aar aat aax ac- aca acc ace aci aco acr act acx aea aec aee aei aeo aer aet aex ai- aia aic aie aii aio air ait aix aoa aoc aoe aoi aoo aor aot aox ar- ara arc are ari aro arr art arx at- ata atc ate ati ato atr att atx ax- axa axe axi axo axr axt axx c-- caa cac cae cai cao car cat cax cca ccc cce cci cco ccr cct ccx ce- cea cec cee cei ceo cer cet cex ci- cia cic cie cii cio cir cit cix co- coa coc coe coi coo cor cot cox cra crc cre cri cro crr crt crx cta ctc cte cti cto ctr ctt ctx cxc cxi cxo cxr cxt cxx eaa eac eae eai eao ear eat eax ec- eca ecc ece eci eco ecr ect ecx eea eec eee eeo eer eet eex eia eic eie eii eio eir eit eix eo- eoa eoc eoe eoi eoo eor eot era erc ere eri ero err ert eta etc ete eti eto etr ett etx ex- exa exc exe exi exo exr ext exx ia- iaa iac iae iai iao iar iat ica icc ice ici ico icr ict ie- iea iec iee iei ier iet iex iia iic iie iii iio iir iit iix io- ioa ioc ioe ioi ioo ior iot ir- ira irc ire iri iro irr irt irx ita itc ite iti ito itt itx ixc ixe ixi o-i oaa oac oae oai oao oar oat oax oc- oca occ oci oco ocr oct ocx oea oec oee oei oeo oer oet oex oia oic oie oii oio oir oit oo- ooa ooc ooi ooo oor oot oox or- ora orc ore ori oro orr ort orx ot- ota otc ote oti oto otr ott ox- oxa oxc oxi oxo oxt oxx ra- raa rac rae rai rao rar rat rax rca rcc rce rci rco rcr rct rcx re- rea rec ree rei reo rer ret rex ria ric rie rii rio rir rit rix roa roc roe roi roo ror rot rox rra rrc rri rrr rrt rta rtc rte rti rto rtr rtt rtx rxr t-x taa tac tae tai tao tar tat tax tca tcc tce tci tco tcr tct tcx te- tea tec tee tei teo ter tet tex tia tic tie tii tio tir tit tix to- toa toc toe toi too tor tot tox tra trc tre tri tro trr trt trx tta ttc tte tti tto ttr ttt ttx txe txi txt xaa xac xar xat xci xcr xcx xee xer xet xex xia xic xie xii xio xit xix xoa xoc xoi xoo xor xot xox xrc xrt xrx xtc xti xtr xtx xxi xxo xxx