-th a-a a-b a-t aaa aab aae aah aao aas aat ab- aba abb abe abh abo abs abt aea aeb aee aeh aeo aes aet aha ahb ahe ahh aho ahs aht aoa aob aoe aoh aoo aos aot as- asa asb ase ash aso ass ast at- ata atb ate ath ato ats att baa bab bae bah bao bas bat bba bbb bbe bbh bbo bbs bbt be- bea beb bee beh beo bes bet bha bhb bhe bhh bho bhs bht boa bob boe boh boo bos bot bsa bsb bse bsh bso bss bst bta btb bte bth bto bts btt eaa eab eae eah eao eas eat eba ebb ebe ebh ebo ebs ebt eea eeb eee eeo ees eet eha ehb ehe ehh eho ehs eht eo- eoa eob eoe eoh eoo eos eot es- esa esb ese esh eso ess est eta etb ete eth eto ets ett haa hab hae hah hao has hat hba hbb hbe hbh hbo hbs hbt he- hea heb hee heh heo hes het hha hhb hhe hhh hho hhs hht hoa hob hoe hoh hoo hos hot hsa hsb hse hsh hss hst hta htb hte hth hto hts htt oaa oab oae oah oao oas oat ob- oba obb obe obh obo obs obt oea oeb oee oeh oeo oes oet oha ohe ohh oho ohs oht oo- ooa oob ooh ooo oos oot os- osa osb ose osh oso oss ost ot- ota otb ote oth oto ots ott saa sab sae sah sao sas sat sba sbb sbe sbh sbo sbs sbt se- sea seb see seh seo ses set sh- sha shb she shh sho shs sht soa sob soe soh soo sos sot ss- ssa ssb sse ssh sso sss sst sta stb ste sth sto sts stt taa tab tae tah tao tas tat tba tbb tbe tbh tbo tbs tbt te- tea teb tee teh teo tes tet th- tha thb the thh tho ths tht to- toa tob toe toh too tos tot tsa tsb tse tsh tso tss tst tta ttb tte tth tto tts ttt