-th a-a a-b a-t aaa aab aad aah aao aar aas aat ab- aba abb abd abh abo abr abs abt ad- ada adb add adh ado adr ads adt aha ahb ahd ahh aho ahr ahs aht aoa aob aod aoh aoo aor aos aot ar- ara arb ard arh aro arr ars art as- asa asb asd ash aso asr ass ast at- ata atb atd ath ato atr ats att baa bab bad bah bao bar bas bat bba bbb bbd bbh bbo bbr bbs bbt bda bdb bdd bdh bdo bdr bds bdt bha bhb bhd bhh bho bhr bhs bht boa bob bod boh boo bor bos bot bra brb brd brh bro brr brs brt bsa bsb bsd bsh bso bsr bss bst bta btb btd bth bto btr bts btt daa dab dad dah dao dar das dat dba dbb dbd dbh dbo dbr dbs dbt dda ddb ddd ddh ddo ddr dds ddt dh- dha dhb dhd dhh dho dhr dhs dht doa dob dod doh doo dor dos dot dra drb drd dro drr drs drt dsa dsb dsd dsh dso dsr dss dst dta dtb dtd dth dto dtr dts dtt haa hab had hah hao har has hat hba hbb hbd hbh hbo hbr hbs hbt hda hdb hdd hdh hdo hdr hds hdt hha hhb hhd hhh hho hhr hhs hht hoa hob hod hoh hoo hor hos hot hr- hra hrb hrd hrh hro hrr hrs hrt hsa hsb hsd hsh hsr hss hst hta htb htd hth hto htr hts htt oaa oab oad oah oao oar oas oat ob- oba obb obd obh obo obr obs obt oda odb odd odh odo odr ods odt oha ohd ohh oho ohr ohs oht oo- ooa oob ood ooh ooo oor oos oot or- ora orb ord orh oro orr ors ort os- osa osb osd osh oso osr oss ost ot- ota otb otd oth oto otr ots ott ra- raa rab rad rah rao rar ras rat rba rbb rbd rbh rbo rbr rbs rbt rda rdb rdd rdh rdo rdr rds rdt rh- rha rhb rhd rhh rho rhr rhs rht roa rob rod roh roo ror ros rot rra rrb rrd rrh rrr rrs rrt rsa rsb rsd rsh rso rsr rss rst rta rtb rtd rto rtr rts rtt saa sab sad sah sao sar sas sat sba sbb sbd sbh sbo sbr sbs sbt sda sdb sdd sdh sdo sdr sds sdt sh- sha shb shd shh sho shr shs sht soa sob sod soh soo sor sos sot sr- sra srb srd srh sro srr srs srt ss- ssa ssb ssd ssh sso ssr sss sst sta stb std sth sto str sts stt taa tab tad tah tao tar tas tat tba tbb tbd tbh tbo tbr tbs tbt tda tdb tdd tdh tdo tdr tds tdt th- tha thb thd thh tho thr ths tht to- toa tob tod toh too tor tos tot tra trb trd trh tro trr trs trt tsa tsb tsd tsh tso tsr tss tst tta ttb ttd tth tto ttr tts ttt