-th a-a a-b a-c a-t aaa aab aac aah aam aao aas aat ab- aba abb abc abh abm abo abs abt ac- aca acb acc ach acm aco acs act aha ahb ahc ahh ahm aho ahs aht ama amb amc amh amm amo ams amt aoa aob aoc aoh aom aoo aos aot as- asa asb asc ash asm aso ass ast at- ata atb atc ath atm ato ats att baa bab bac bah bam bao bas bat bba bbb bbc bbh bbm bbo bbs bbt bca bcb bcc bch bcm bco bcs bct bha bhb bhc bhh bhm bho bhs bht bma bmb bmc bmh bmm bmo bms bmt boa bob boc boh bom boo bos bot bsa bsb bsc bsh bsm bso bss bst bta btb btc bth btm bto bts btt c-- caa cab cac cah cam cao cas cat cba cbb cbc cbh cbm cbo cbs cbt cca ccb ccc cch ccm cco ccs cct ch- cha chb chc chh chm cho chs cht cma cmb cmc cmh cmm cmo cms cmt co- coa cob coc coh com coo cos cot csa csb csc csh csm cso css cst cta ctb ctc cth ctm cto cts ctt haa hab hac hah ham hao has hat hba hbb hbc hbh hbm hbo hbs hbt hca hcb hcc hch hcm hco hcs hct hha hhb hhc hhh hhm hho hhs hht hma hmb hmc hmh hmm hmo hms hmt hoa hob hoc hoh hom hoo hos hot hsa hsb hsc hsh hsm hss hst hta htb htc hth htm hto hts htt m-o maa mab mac mah mam mao mas mat mba mbb mbc mbh mbm mbo mbs mbt mc- mca mcb mcc mch mcm mco mcs mct mha mhc mhh mhm mho mhs mht mma mmb mmc mmh mmm mmo mms mmt moa mob moc moh mom moo mos mot msa msb msc msh msm mso mss mst mta mtb mtc mth mtm mto mts mtt oaa oab oac oah oam oao oas oat ob- oba obb obc obh obm obo obs obt oc- oca ocb occ och ocm oco ocs oct oha ohc ohh ohm oho ohs oht om- oma omb omc omh omm omo oms omt oo- ooa oob ooc ooh oom ooo oos oot os- osa osb osc osh osm oso oss ost ot- ota otb otc oth otm oto ots ott saa sab sac sah sam sao sas sat sba sbb sbc sbh sbm sbo sbs sbt sca scb scc sch scm sco scs sct sh- sha shb shc shh shm sho shs sht sma smb smc smh smm smo sms smt soa sob soc soh som soo sos sot ss- ssa ssb ssc ssh ssm sso sss sst sta stb stc sth stm sto sts stt taa tab tac tah tam tao tas tat tba tbb tbc tbh tbm tbo tbs tbt tca tcb tcc tch tcm tco tcs tct th- tha thb thc thh thm tho ths tht tma tmb tmc tmh tmm tmo tms tmt to- toa tob toc toh tom too tos tot tsa tsb tsc tsh tsm tso tss tst tta ttb ttc tth ttm tto tts ttt