-er -ic a-a a-c a-i aaa aac aae aai aak aam aao aar ac- aca acc ace aci ack acm aco acr aea aec aee aei aek aem aeo aer ai- aia aic aie aii aik aim aio air aka akc ake aki akk akm ako akr ama amc ame ami amk amm amo amr aoa aoc aoe aoi aok aom aoo aor ar- ara arc are ari ark arm aro arr c-- caa cac cae cai cak cam cao car cca ccc cce cci cck ccm cco ccr ce- cea cec cee cei cek cem ceo cer ci- cia cic cie cii cik cim cio cir cka ckc cki ckm cko cma cmc cme cmi cmk cmm cmo cmr co- coa coc coe coi cok com coo cor cra crc cre cri crk crm cro crr eaa eac eae eai eak eam eao ear ec- eca ecc ece eci eck ecm eco ecr eea eec eee eek eem eeo eer eia eic eie eii eik eim eio eir eka ekc eke eki eko ekr em- ema emc eme emi emk emm emo emr eo- eoa eoc eoe eoi eok eom eoo eor era erc ere eri erk erm ero err ia- iaa iac iae iai iam iao iar ica icc ice ici ick icm ico icr ie- iea iec iee iei iek iem ier iia iic iie iii iim iio iir ika ikc ike iki ikk iko ikr im- ima imc ime imi imm imo io- ioa ioc ioe ioi iom ioo ior ir- ira irc ire iri irk irm iro irr ka- kaa kac kae kai kak kam kao kar kca kcc kce kci kck kcm kcr ke- kea kec kee kei kek kem keo ker kia kic kie kii kik kim kio kir kkc kke kki kkk kkm kkr kma kmc kme kmi kmk kmm kmo koa koc koe koi kok kom koo kor kra krc kri krk kro krr m-o m-r maa mac mae mai mak mam mao mar mc- mca mcc mce mci mck mcm mco mcr mea mec mee mei mek mem meo mer mi- mia mic mie mii mik mim mio mir mka mkc mke mkk mkm mko mkr mma mmc mme mmi mmk mmm mmo mmr moa moc moe moi mok mom moo mor mra mrc mre mri mrk mrm mro mrr o-i oaa oac oae oai oak oam oao oar oc- oca occ oci ock ocm oco ocr oea oec oee oei oem oeo oer oia oic oie oii oik oim oio oir oka okc oke oki okk oko okr om- oma omc ome omi omm omo omr oo- ooa ooc ooi ook oom ooo oor or- ora orc ore ori ork orm oro orr ra- raa rac rae rai rak ram rao rar rca rcc rce rci rcm rco rcr re- rea rec ree rei rek rem reo rer ria ric rie rii rik rim rio rir rkc rke rkk rkm rko rma rmc rme rmi rmm rmo rmr roa roc roe roi rok rom roo ror rra rrc rri rrk rrm rrr