-th a-a a-b a-t aaa aab aah aam aao aas aat ab- aba abb abh abm abo abs abt aha ahb ahh ahm aho ahs aht ama amb amh amm amo ams amt aoa aob aoh aom aoo aos aot as- asa asb ash asm aso ass ast at- ata atb ath atm ato ats att baa bab bah bam bao bas bat bba bbb bbh bbm bbo bbs bbt bha bhb bhh bhm bho bhs bht bma bmb bmh bmm bmo bms bmt boa bob boh bom boo bos bot bsa bsb bsh bsm bso bss bst bta btb bth btm bto bts btt haa hab hah ham hao has hat hba hbb hbh hbm hbo hbs hbt hha hhb hhh hhm hho hhs hht hma hmb hmh hmm hmo hms hmt hoa hob hoh hom hoo hos hot hsa hsb hsh hsm hss hst hta htb hth htm hto hts htt m-o maa mab mah mam mao mas mat mba mbb mbh mbm mbo mbs mbt mha mhh mhm mho mhs mht mma mmb mmh mmm mmo mms mmt moa mob moh mom moo mos mot msa msb msh msm mso mss mst mta mtb mth mtm mto mts mtt oaa oab oah oam oao oas oat ob- oba obb obh obm obo obs obt oha ohh ohm oho ohs oht om- oma omb omh omm omo oms omt oo- ooa oob ooh oom ooo oos oot os- osa osb osh osm oso oss ost ot- ota otb oth otm oto ots ott saa sab sah sam sao sas sat sba sbb sbh sbm sbo sbs sbt sh- sha shb shh shm sho shs sht sma smb smh smm smo sms smt soa sob soh som soo sos sot ss- ssa ssb ssh ssm sso sss sst sta stb sth stm sto sts stt taa tab tah tam tao tas tat tba tbb tbh tbm tbo tbs tbt th- tha thb thh thm tho ths tht tma tmb tmh tmm tmo tms tmt to- toa tob toh tom too tos tot tsa tsb tsh tsm tso tss tst tta ttb tth ttm tto tts ttt