a-a a-b a-i a-t aaa aab aaf aai aam aar aat ab- aba abb abf abi abm abr abt af- afa afb aff afi afm afr aft ai- aia aib aif aii aim air ait ama amb amf ami amm amr amt ar- ara arb arf ari arm arr art at- ata atb atf ati atm atr att baa bab baf bai bam bar bat bba bbb bbf bbi bbm bbr bbt bfa bfb bff bfi bfm bfr bft bi- bia bib bif bii bim bir bit bma bmb bmf bmi bmm bmr bmt bra brb brf bri brm brr brt bta btb btf bti btm btr btt faa fab faf fai fam far fat fba fbb fbf fbi fbm fbr fbt ffa fff ffi ffm ffr fft fia fib fif fii fim fir fit fma fmb fmf fmi fmm fmr fmt fra frb frf fri frm frr frt fta ftb ftf fti ftm ftr ftt i-f ia- iaa iab iaf iai iam iar iat iba ibb ibf ibi ibm ibr ibt ifa ifb iff ifi ifm ifr ift iia iib iif iii iim iir iit im- ima imb imf imi imm imt ir- ira irb irf iri irm irr irt ita itb itf iti itm itt m-f m-r maa mab maf mai mam mar mat mba mbb mbf mbi mbm mbr mbt mfa mfb mff mfi mfm mfr mft mi- mia mib mif mii mim mir mit mma mmb mmf mmi mmm mmr mmt mra mrb mrf mri mrm mrr mrt mta mtb mtf mti mtm mtr mtt ra- raa rab raf rai ram rar rat rba rbb rbf rbi rbm rbr rbt rfa rfb rff rfi rfm rfr rft ria rib rif rii rim rir rit rma rmb rmf rmi rmm rmr rmt rra rrb rrf rri rrm rrr rrt rta rtb rtf rti rtm rtr rtt taa tab taf tai tam tar tat tba tbb tbf tbi tbm tbr tbt tfa tfb tff tfi tfm tfr tft tia tib tif tii tim tir tit tma tmb tmf tmi tmm tmr tmt tra trb trf tri trm trr trt tta ttb ttf tti ttm ttr ttt