a-a a-c a-t aaa aac aaf aam aao aar aas aat ac- aca acc acf acm aco acr acs act af- afa afc aff afm afo afr afs aft ama amc amf amm amo amr ams amt aoa aoc aof aom aoo aor aos aot ar- ara arc arf arm aro arr ars art as- asa asc asf asm aso asr ass ast at- ata atc atf atm ato atr ats att c-- caa cac caf cam cao car cas cat cca ccc ccf ccm cco ccr ccs cct cfa cfc cff cfm cfo cfr cfs cft cma cmc cmf cmm cmo cmr cms cmt co- coa coc cof com coo cor cos cot cra crc crf crm cro crr crs crt csa csc csf csm cso csr css cst cta ctc ctf ctm cto ctr cts ctt faa fac faf fam fao far fas fat fca fcc fcf fcm fco fcr fcs fct ffa ffc fff ffm ffo ffr ffs fft fma fmc fmf fmm fmo fmr fms fmt foa foc fof fom foo for fos fot fra frc frf frm fro frr frs frt fsa fsc fsf fsm fso fsr fss fst fta ftc ftf ftm fto ftr fts ftt m-f m-o m-r maa mac maf mam mao mar mas mat mc- mca mcc mcf mcm mco mcr mcs mct mfa mfc mff mfm mfo mfr mfs mft mma mmc mmf mmm mmo mmr mms mmt moa moc mof mom moo mor mos mot mra mrc mrf mrm mro mrr mrs mrt msa msc msf msm mso msr mss mst mta mtc mtf mtm mto mtr mts mtt oaa oac oaf oam oao oar oas oat oc- oca occ ocf ocm oco ocr ocs oct of- ofa ofc off ofm ofo ofr ofs oft om- oma omc omf omm omo omr oms omt oo- ooa ooc oof oom ooo oor oos oot or- ora orc orf orm oro orr ors ort os- osa osc osf osm oso osr oss ost ot- ota otc otf otm oto otr ots ott ra- raa rac raf ram rao rar ras rat rca rcc rcf rcm rco rcr rcs rct rfa rfc rff rfm rfo rfr rfs rft rma rmc rmf rmm rmo rmr rms rmt roa roc rof rom roo ror ros rot rra rrc rrf rrm rrr rrs rrt rsa rsc rsf rsm rso rsr rss rst rta rtc rtf rtm rto rtr rts rtt saa sac saf sam sao sar sas sat sca scc scf scm sco scr scs sct sfa sfc sff sfm sfo sfr sfs sft sma smc smf smm smo smr sms smt soa soc sof som soo sor sos sot sr- sra src srf srm sro srr srs srt ss- ssa ssc ssf ssm sso ssr sss sst sta stc stf stm sto str sts stt taa tac taf tam tao tar tas tat tca tcc tcf tcm tco tcr tcs tct tfa tfc tff tfm tfo tfr tfs tft tma tmc tmf tmm tmo tmr tms tmt to- toa toc tof tom too tor tos tot tra trc trf trm tro trr trs trt tsa tsc tsf tsm tso tsr tss tst tta ttc ttf ttm tto ttr tts ttt