-er -ic a-a a-c a-i aaa aac aae aai aao aar aas aax ac- aca acc ace aci aco acr acs acx aea aec aee aei aeo aer aes aex ai- aia aic aie aii aio air ais aix aoa aoc aoe aoi aoo aor aos aox ar- ara arc are ari aro arr ars arx as- asa asc ase asi aso asr ass asx ax- axa axe axi axo axr axs axx c-- caa cac cae cai cao car cas cax cca ccc cce cci cco ccr ccs ccx ce- cea cec cee cei ceo cer ces cex ci- cia cic cie cii cio cir cis cix co- coa coc coe coi coo cor cos cox cra crc cre cri cro crr crs crx csa csc cse csi cso csr css csx cxc cxi cxo cxr cxs cxx eaa eac eae eai eao ear eas eax ec- eca ecc ece eci eco ecr ecs ecx eea eec eee eeo eer ees eex eia eic eie eii eio eir eis eix eo- eoa eoc eoe eoi eoo eor eos era erc ere eri ero err ers es- esa esc ese esi eso esr ess esx ex- exa exc exe exi exo exr exs exx ia- iaa iac iae iai iao iar ias ica icc ice ici ico icr ics ie- iea iec iee iei ier ies iex iia iic iie iii iio iir iis iix io- ioa ioc ioe ioi ioo ior ios ir- ira irc ire iri iro irr irs irx is- isa isc ise isi iso isr iss ixc ixe ixi o-i oaa oac oae oai oao oar oas oax oc- oca occ oci oco ocr ocs ocx oea oec oee oei oeo oer oes oex oia oic oie oii oio oir ois oo- ooa ooc ooi ooo oor oos oox or- ora orc ore ori oro orr ors orx os- osa osc ose osi oso osr oss osx ox- oxa oxc oxi oxo oxx ra- raa rac rae rai rao rar ras rax rca rcc rce rci rco rcr rcs rcx re- rea rec ree rei reo rer res rex ria ric rie rii rio rir ris rix roa roc roe roi roo ror ros rox rra rrc rri rrr rrs rsa rsc rse rsi rso rsr rss rsx rxr rxs saa sac sae sai sao sar sas sax sca scc sce sci sco scr scs scx se- sea sec see sei seo ser ses sex sia sic sie sii sio sir sis six soa soc soe soi soo sor sos sox sr- sra src sre sri sro srr srs srx ss- ssa ssc sse ssi sso ssr sss ssx sxc sxi sxs xaa xac xar xas xci xcr xcx xee xer xes xex xia xic xie xii xio xis xix xoa xoc xoi xoo xor xos xox xrc xrx xsa xsc xsi xss xxi xxo xxx