a-a a-t aaa aaf aam aar aas aat aax af- afa aff afm afr afs aft afx ama amf amm amr ams amt amx ar- ara arf arm arr ars art arx as- asa asf asm asr ass ast asx at- ata atf atm atr ats att atx ax- axa axm axr axs axt axx faa faf fam far fas fat fax ffa fff ffm ffr ffs fft ffx fma fmf fmm fmr fms fmt fmx fra frf frm frr frs frt fsa fsf fsm fsr fss fst fsx fta ftf ftm ftr fts ftt ftx fxm fxr fxs fxt fxx m-f m-r maa maf mam mar mas mat max mfa mff mfm mfr mfs mft mma mmf mmm mmr mms mmt mmx mra mrf mrm mrr mrs mrt mrx msa msf msm msr mss mst msx mta mtf mtm mtr mts mtt mtx mxa mxr mxs ra- raa raf ram rar ras rat rax rfa rff rfm rfr rfs rft rma rmf rmm rmr rms rmt rmx rra rrf rrm rrr rrs rrt rsa rsf rsm rsr rss rst rsx rta rtf rtm rtr rts rtt rtx rxr rxs saa saf sam sar sas sat sax sfa sff sfm sfr sfs sft sfx sma smf smm smr sms smt smx sr- sra srf srm srr srs srt srx ss- ssa ssf ssm ssr sss sst ssx sta stf stm str sts stt stx sxm sxs sxt t-x taa taf tam tar tas tat tax tfa tff tfm tfr tfs tft tfx tma tmf tmm tmr tms tmt tmx tra trf trm trr trs trt trx tsa tsf tsm tsr tss tst tsx tta ttf ttm ttr tts ttt ttx txf txs txt xaa xaf xam xar xas xat xfa xfm xfs xft xfx xma xmf xmm xmr xms xmt xmx xrf xrt xrx xsa xsm xss xst xtf xtm xtr xts xtx xxx