-th a-a a-b a-t aaa aab aah aan aao aas aat ab- aba abb abh abn abo abs abt aha ahb ahh ahn aho ahs aht an- ana anb anh ann ano ans ant aoa aob aoh aon aoo aos aot as- asa asb ash asn aso ass ast at- ata atb ath atn ato ats att baa bab bah ban bao bas bat bba bbb bbh bbn bbo bbs bbt bha bhb bhh bho bhs bht bna bnb bnn bno bns bnt boa bob boh bon boo bos bot bsa bsb bsh bsn bso bss bst bta btb bth btn bto bts btt haa hab hah han hao has hat hba hbb hbh hbn hbo hbs hbt hha hhb hhh hhn hho hhs hht hna hnb hnh hnn hno hns hnt hoa hob hoh hon hoo hos hot hsa hsb hsh hsn hss hst hta htb hth htn hto hts htt naa nab nah nan nao nas nat nba nbb nbn nbo nbs nbt nha nhb nhh nhn nhs nht nna nnb nnh nnn nno nns nnt no- noa nob noh non noo nos not nsa nsb nsh nsn nso nss nst nta ntb nth ntn nto nts ntt oaa oab oah oan oao oas oat ob- oba obb obh obn obo obs obt oha ohh ohn oho ohs oht on- ona onb onh onn ono ons ont oo- ooa oob ooh oon ooo oos oot os- osa osb osh osn oso oss ost ot- ota otb oth otn oto ots ott saa sab sah san sao sas sat sba sbb sbh sbn sbo sbs sbt sh- sha shb shh shn sho shs sht sna snb snn sno sns snt soa sob soh son soo sos sot ss- ssa ssb ssh ssn sso sss sst sta stb sth stn sto sts stt taa tab tah tan tao tas tat tba tbb tbh tbn tbo tbs tbt th- tha thb thh thn tho ths tht tna tnb tnh tnn tno tns tnt to- toa tob toh ton too tos tot tsa tsb tsh tsn tso tss tst tta ttb tth ttn tto tts ttt