a-a a-c a-t aaa aac aaf aam aao aar aat ac- aca acc acf acm aco acr act af- afa afc aff afm afo afr aft ama amc amf amm amo amr amt aoa aoc aof aom aoo aor aot ar- ara arc arf arm aro arr art at- ata atc atf atm ato atr att c-- caa cac caf cam cao car cat cca ccc ccf ccm cco ccr cct cfa cfc cff cfm cfo cfr cft cma cmc cmf cmm cmo cmr cmt co- coa coc cof com coo cor cot cra crc crf crm cro crr crt cta ctc ctf ctm cto ctr ctt faa fac faf fam fao far fat fca fcc fcf fcm fco fcr fct ffa ffc fff ffm ffo ffr fft fma fmc fmf fmm fmo fmr fmt foa foc fof fom foo for fot fra frc frf frm fro frr frt fta ftc ftf ftm fto ftr ftt m-f m-o m-r maa mac maf mam mao mar mat mc- mca mcc mcf mcm mco mcr mct mfa mfc mff mfm mfo mfr mft mma mmc mmf mmm mmo mmr mmt moa moc mof mom moo mor mot mra mrc mrf mrm mro mrr mrt mta mtc mtf mtm mto mtr mtt oaa oac oaf oam oao oar oat oc- oca occ ocf ocm oco ocr oct of- ofa ofc off ofm ofo ofr oft om- oma omc omf omm omo omr omt oo- ooa ooc oof oom ooo oor oot or- ora orc orf orm oro orr ort ot- ota otc otf otm oto otr ott ra- raa rac raf ram rao rar rat rca rcc rcf rcm rco rcr rct rfa rfc rff rfm rfo rfr rft rma rmc rmf rmm rmo rmr rmt roa roc rof rom roo ror rot rra rrc rrf rrm rrr rrt rta rtc rtf rtm rto rtr rtt taa tac taf tam tao tar tat tca tcc tcf tcm tco tcr tct tfa tfc tff tfm tfo tfr tft tma tmc tmf tmm tmo tmr tmt to- toa toc tof tom too tor tot tra trc trf trm tro trr trt tta ttc ttf ttm tto ttr ttt