-th a-a a-t aaa aah aao aas aat aax aha ahh aho ahs aht ahx aoa aoh aoo aos aot aox as- asa ash aso ass ast asx at- ata ath ato ats att atx ax- axa axh axo axs axt axx haa hah hao has hat hax hha hhh hho hhs hht hoa hoh hoo hos hot hox hsa hsh hss hst hsx hta hth hto hts htt htx oaa oah oao oas oat oax oha ohh oho ohs oht oo- ooa ooh ooo oos oot oox os- osa osh oso oss ost osx ot- ota oth oto ots ott ox- oxa oxo oxt oxx saa sah sao sas sat sax sh- sha shh sho shs sht soa soh soo sos sot sox ss- ssa ssh sso sss sst ssx sta sth sto sts stt stx sxs sxt t-x taa tah tao tas tat tax th- tha thh tho ths tht thx to- toa toh too tos tot tox tsa tsh tso tss tst tsx tta tth tto tts ttt ttx txs txt xaa xas xat xht xoa xoo xos xot xox xsa xss xst xts xtx xxo xxx