a-a a-c aaa aac aaf aam aan aao aar ac- aca acc acf acm acn aco acr af- afa afc aff afm afn afo afr ama amc amf amm amn amo amr an- ana anc anf anm ann ano anr aoa aoc aof aom aon aoo aor ar- ara arc arf arm arn aro arr c-- caa cac caf cam can cao car cca ccc ccf ccm ccn cco ccr cfa cfc cff cfm cfn cfo cfr cma cmc cmf cmm cmn cmo cmr cn- cna cnc cnf cnm cnn cno cnr co- coa coc cof com con coo cor cra crc crf crm crn cro crr faa fac faf fam fan fao far fca fcc fcf fcm fcn fco fcr ffa ffc fff ffm ffn ffo ffr fma fmc fmf fmm fmn fmo fmr fna fnc fnf fnm fnn fnr foa foc fof fom fon foo for fra frc frf frm frn fro frr m-f m-o m-r maa mac maf mam man mao mar mc- mca mcc mcf mcm mcn mco mcr mfa mfc mff mfm mfn mfo mfr mma mmc mmf mmm mmn mmo mmr mna mnc mnf mnm mnn mno mnr moa moc mof mom mon moo mor mra mrc mrf mrm mrn mro mrr naa nac naf nam nan nao nar nca ncc ncf ncm ncn nco ncr nfa nfc nff nfn nfo nfr nma nmc nmm nmn nmo nmr nna nnc nnf nnm nnn nno no- noa noc nof nom non noo nor nra nrc nrf nrm nrn nro nrr oaa oac oaf oam oan oao oar oc- oca occ ocf ocm ocn oco ocr of- ofa ofc off ofm ofn ofo ofr om- oma omc omf omm omn omo omr on- ona onc onf onn ono onr oo- ooa ooc oof oom oon ooo oor or- ora orc orf orm orn oro orr ra- raa rac raf ram ran rao rar rca rcc rcf rcm rcn rco rcr rfa rfc rff rfm rfn rfo rfr rma rmc rmf rmm rmn rmo rmr rna rnc rnm rnn rno rnr roa roc rof rom ron roo ror rra rrc rrf rrm rrn rrr