-th a-a a-b a-t aaa aab aae aah aan aao aas aat ab- aba abb abe abh abn abo abs abt aea aeb aee aeh aen aeo aes aet aha ahb ahe ahh ahn aho ahs aht an- ana anb ane anh ann ano ans ant aoa aob aoe aoh aon aoo aos aot as- asa asb ase ash asn aso ass ast at- ata atb ate ath atn ato ats att baa bab bae bah ban bao bas bat bba bbb bbe bbh bbn bbo bbs bbt be- bea beb bee beh ben beo bes bet bha bhb bhe bhh bho bhs bht bna bnb bne bnn bno bns bnt boa bob boe boh bon boo bos bot bsa bsb bse bsh bsn bso bss bst bta btb bte bth btn bto bts btt eaa eab eae eah ean eao eas eat eba ebb ebe ebh ebn ebo ebs ebt eea eeb eee een eeo ees eet eha ehb ehe ehh ehn eho ehs eht en- ena enb ene enh enn eno ens ent eo- eoa eob eoe eoh eon eoo eos eot es- esa esb ese esh esn eso ess est eta etb ete eth etn eto ets ett haa hab hae hah han hao has hat hba hbb hbe hbh hbn hbo hbs hbt he- hea heb hee heh hen heo hes het hha hhb hhe hhh hhn hho hhs hht hna hnb hne hnh hnn hno hns hnt hoa hob hoe hoh hon hoo hos hot hsa hsb hse hsh hsn hss hst hta htb hte hth htn hto hts htt naa nab nae nah nan nao nas nat nba nbb nbe nbn nbo nbs nbt ne- nea neb nee neh nen neo nes net nha nhb nhe nhh nhn nhs nht nna nnb nne nnh nnn nno nns nnt no- noa nob noe noh non noo nos not nsa nsb nse nsh nsn nso nss nst nta ntb nte nth ntn nto nts ntt oaa oab oae oah oan oao oas oat ob- oba obb obe obh obn obo obs obt oea oeb oee oeh oen oeo oes oet oha ohe ohh ohn oho ohs oht on- ona onb one onh onn ono ons ont oo- ooa oob ooh oon ooo oos oot os- osa osb ose osh osn oso oss ost ot- ota otb ote oth otn oto ots ott saa sab sae sah san sao sas sat sba sbb sbe sbh sbn sbo sbs sbt se- sea seb see seh sen seo ses set sh- sha shb she shh shn sho shs sht sna snb sne snn sno sns snt soa sob soe soh son soo sos sot ss- ssa ssb sse ssh ssn sso sss sst sta stb ste sth stn sto sts stt taa tab tae tah tan tao tas tat tba tbb tbe tbh tbn tbo tbs tbt te- tea teb tee teh ten teo tes tet th- tha thb the thh thn tho ths tht tna tnb tne tnh tnn tno tns tnt to- toa tob toe toh ton too tos tot tsa tsb tse tsh tsn tso tss tst tta ttb tte tth ttn tto tts ttt