-th a-a a-b a-t aaa aab aah aan aas aat ab- aba abb abh abn abs abt aha ahb ahh ahn ahs aht an- ana anb anh ann ans ant as- asa asb ash asn ass ast at- ata atb ath atn ats att baa bab bah ban bas bat bba bbb bbh bbn bbs bbt bha bhb bhh bhs bht bna bnb bnn bns bnt bsa bsb bsh bsn bss bst bta btb bth btn bts btt haa hab hah han has hat hba hbb hbh hbn hbs hbt hha hhb hhh hhn hhs hht hna hnb hnh hnn hns hnt hsa hsb hsh hsn hss hst hta htb hth htn hts htt naa nab nah nan nas nat nba nbb nbn nbs nbt nha nhb nhh nhn nhs nht nna nnb nnh nnn nns nnt nsa nsb nsh nsn nss nst nta ntb nth ntn nts ntt saa sab sah san sas sat sba sbb sbh sbn sbs sbt sh- sha shb shh shn shs sht sna snb snn sns snt ss- ssa ssb ssh ssn sss sst sta stb sth stn sts stt taa tab tah tan tas tat tba tbb tbh tbn tbs tbt th- tha thb thh thn ths tht tna tnb tnh tnn tns tnt tsa tsb tsh tsn tss tst tta ttb tth ttn tts ttt