-er a-a a-c aaa aac aae aam aao aar aau aax ac- aca acc ace acm aco acr acu acx aea aec aee aem aeo aer aeu aex ama amc ame amm amo amr amu amx aoa aoc aoe aom aoo aor aou aox ar- ara arc are arm aro arr aru arx au- aua auc aue aum auo aur aux ax- axa axe axm axo axr axx c-- caa cac cae cam cao car cau cax cca ccc cce ccm cco ccr ccu ccx ce- cea cec cee cem ceo cer ceu cex cma cmc cme cmm cmo cmr cmu cmx co- coa coc coe com coo cor cou cox cra crc cre crm cro crr cru crx cua cuc cue cum cuo cur cuu cxc cxo cxr cxx eaa eac eae eam eao ear eau eax ec- eca ecc ece ecm eco ecr ecu ecx eea eec eee eem eeo eer eex em- ema emc eme emm emo emr emu emx eo- eoa eoc eoe eom eoo eor eou era erc ere erm ero err eru eu- eua euc eue eur eux ex- exa exc exe exo exr exu exx m-o m-r maa mac mae mam mao mar mau max mc- mca mcc mce mcm mco mcr mcu mcx mea mec mee mem meo mer meu mex mma mmc mme mmm mmo mmr mmu mmx moa moc moe mom moo mor mou mox mra mrc mre mrm mro mrr mru mrx mua muc mue mum mur muu mux mxa mxc mxr mxu oaa oac oae oam oao oar oau oax oc- oca occ ocm oco ocr ocu ocx oea oec oee oem oeo oer oex om- oma omc ome omm omo omr omu omx oo- ooa ooc oom ooo oor oox or- ora orc ore orm oro orr oru orx ou- oua ouc oue oum ouo our ox- oxa oxc oxo oxx ra- raa rac rae ram rao rar rau rax rca rcc rce rcm rco rcr rcu rcx re- rea rec ree rem reo rer reu rex rma rmc rme rmm rmo rmr rmx roa roc roe rom roo ror rou rox rra rrc rrm rrr rru rua ruc rue rum ruo rur ruu rux rxr ua- uaa uac uae uam uao uar uau uca ucc uce ucm uco ucr ucu uea uec uee uem uer um- uma umc ume umm umo umr umu uoa uoc uoe uom uoo uor uox ur- ura urc ure urm uro urr uru urx uua uuc uue uum uur uuu uxc uxo uxr uxu xaa xac xam xar xau xcr xcx xee xem xer xeu xex xma xmc xmm xmo xmr xmu xmx xoa xoc xom xoo xor xox xrc xrx xue xxo xxx