-er a-a a-c aaa aac aae aaf aam aan aar ac- aca acc ace acf acm acn acr aea aec aee aef aem aen aer af- afa afc afe aff afm afn afr ama amc ame amf amm amn amr an- ana anc ane anf anm ann anr ar- ara arc are arf arm arn arr c-- caa cac cae caf cam can car cca ccc cce ccf ccm ccn ccr ce- cea cec cee cef cem cen cer cfa cfc cfe cff cfm cfn cfr cma cmc cme cmf cmm cmn cmr cn- cna cnc cne cnf cnm cnn cnr cra crc cre crf crm crn crr eaa eac eae eaf eam ean ear ec- eca ecc ece ecf ecm ecn ecr eea eec eee eef eem een eer ef- efa efc efe eff efm efr em- ema emc eme emf emm emn emr en- ena enc ene enf enm enn enr era erc ere erf erm ern err faa fac fae faf fam fan far fca fcc fce fcf fcm fcn fcr fea fec fee fef fem fen fer ffa ffc ffe fff ffm ffn ffr fma fmc fme fmf fmm fmn fmr fna fnc fne fnf fnm fnn fnr fra frc fre frf frm frn frr m-f m-r maa mac mae maf mam man mar mc- mca mcc mce mcf mcm mcn mcr mea mec mee mef mem men mer mfa mfc mfe mff mfm mfn mfr mma mmc mme mmf mmm mmn mmr mna mnc mne mnf mnm mnn mnr mra mrc mre mrf mrm mrn mrr naa nac nae naf nam nan nar nca ncc nce ncf ncm ncn ncr ne- nea nec nee nef nem nen ner nfa nfc nfe nff nfn nfr nma nmc nme nmm nmn nmr nna nnc nne nnf nnm nnn nra nrc nre nrf nrm nrn nrr ra- raa rac rae raf ram ran rar rca rcc rce rcf rcm rcn rcr re- rea rec ree ref rem ren rer rfa rfc rfe rff rfm rfn rfr rma rmc rme rmf rmm rmn rmr rna rnc rnm rnn rnr rra rrc rrf rrm rrn rrr