-er a-a a-c aaa aac aae aam aan aao aar ac- aca acc ace acm acn aco acr aea aec aee aem aen aeo aer ama amc ame amm amn amo amr an- ana anc ane anm ann ano anr aoa aoc aoe aom aon aoo aor ar- ara arc are arm arn aro arr c-- caa cac cae cam can cao car cca ccc cce ccm ccn cco ccr ce- cea cec cee cem cen ceo cer cma cmc cme cmm cmn cmo cmr cn- cna cnc cne cnm cnn cno cnr co- coa coc coe com con coo cor cra crc cre crm crn cro crr eaa eac eae eam ean eao ear ec- eca ecc ece ecm ecn eco ecr eea eec eee eem een eeo eer em- ema emc eme emm emn emo emr en- ena enc ene enm enn eno enr eo- eoa eoc eoe eom eon eoo eor era erc ere erm ern ero err m-o m-r maa mac mae mam man mao mar mc- mca mcc mce mcm mcn mco mcr mea mec mee mem men meo mer mma mmc mme mmm mmn mmo mmr mna mnc mne mnm mnn mno mnr moa moc moe mom mon moo mor mra mrc mre mrm mrn mro mrr naa nac nae nam nan nao nar nca ncc nce ncm ncn nco ncr ne- nea nec nee nem nen neo ner nma nmc nme nmm nmn nmo nmr nna nnc nne nnm nnn nno no- noa noc noe nom non noo nor nra nrc nre nrm nrn nro nrr oaa oac oae oam oan oao oar oc- oca occ ocm ocn oco ocr oea oec oee oem oen oeo oer om- oma omc ome omm omn omo omr on- ona onc one onn ono onr oo- ooa ooc oom oon ooo oor or- ora orc ore orm orn oro orr ra- raa rac rae ram ran rao rar rca rcc rce rcm rcn rco rcr re- rea rec ree rem ren reo rer rma rmc rme rmm rmn rmo rmr rna rnc rnm rnn rno rnr roa roc roe rom ron roo ror rra rrc rrm rrn rrr