-th a-a a-b a-t aaa aab aaf aah aar aas aat ab- aba abb abf abh abr abs abt af- afa afb aff afh afr afs aft aha ahb ahf ahh ahr ahs aht ar- ara arb arf arh arr ars art as- asa asb asf ash asr ass ast at- ata atb atf ath atr ats att baa bab baf bah bar bas bat bba bbb bbf bbh bbr bbs bbt bfa bfb bff bfh bfr bfs bft bha bhb bhf bhh bhr bhs bht bra brb brf brh brr brs brt bsa bsb bsf bsh bsr bss bst bta btb btf bth btr bts btt faa fab faf fah far fas fat fba fbb fbf fbh fbr fbs fbt ffa fff ffh ffr ffs fft fha fhb fhf fhh fhr fhs fra frb frf frh frr frs frt fsa fsb fsf fsh fsr fss fst fta ftb ftf fth ftr fts ftt haa hab haf hah har has hat hba hbb hbf hbh hbr hbs hbt hfa hfb hff hfh hfr hfs hft hha hhb hhf hhh hhr hhs hht hr- hra hrb hrf hrh hrr hrs hrt hsa hsb hsf hsh hsr hss hst hta htb htf hth htr hts htt ra- raa rab raf rah rar ras rat rba rbb rbf rbh rbr rbs rbt rfa rfb rff rfh rfr rfs rft rh- rha rhb rhf rhh rhr rhs rht rra rrb rrf rrh rrr rrs rrt rsa rsb rsf rsh rsr rss rst rta rtb rtf rtr rts rtt saa sab saf sah sar sas sat sba sbb sbf sbh sbr sbs sbt sfa sfb sff sfh sfr sfs sft sh- sha shb shf shh shr shs sht sr- sra srb srf srh srr srs srt ss- ssa ssb ssf ssh ssr sss sst sta stb stf sth str sts stt taa tab taf tah tar tas tat tba tbb tbf tbh tbr tbs tbt tfa tfb tff tfh tfr tfs tft th- tha thb thf thh thr ths tht tra trb trf trh trr trs trt tsa tsb tsf tsh tsr tss tst tta ttb ttf tth ttr tts ttt