-th a-a a-b a-c a-t aaa aab aac aae aaf aah aak aas aat ab- aba abb abc abe abf abh abk abs abt ac- aca acb acc ace acf ach ack acs act aea aeb aec aee aef aeh aek aes aet af- afa afb afc afe aff afh afk afs aft aha ahb ahc ahe ahf ahh ahk ahs aht aka akb akc ake akh akk aks as- asa asb asc ase asf ash ask ass ast at- ata atb atc ate atf ath ats att baa bab bac bae baf bah bak bas bat bba bbb bbc bbe bbf bbh bbk bbs bbt bca bcb bcc bce bcf bch bck bcs bct be- bea beb bec bee bef beh bek bes bet bfa bfb bfc bfe bff bfh bfs bft bha bhb bhc bhe bhf bhh bhk bhs bht bka bkb bkc bke bkf bkk bks bkt bsa bsb bsc bse bsf bsh bsk bss bst bta btb btc bte btf bth btk bts btt c-- caa cab cac cae caf cah cak cas cat cba cbb cbc cbe cbf cbh cbk cbs cbt cca ccb ccc cce ccf cch cck ccs cct ce- cea ceb cec cee cef ceh cek ces cet cfa cfb cfc cfe cff cfh cfk cfs cft ch- cha chb chc che chf chh chk chs cht cka ckb ckc ckh cks ckt csa csb csc cse csf csh csk css cst cta ctb ctc cte ctf cth ctk cts ctt eaa eab eac eae eaf eah eak eas eat eba ebb ebc ebe ebf ebh ebk ebs ebt ec- eca ecb ecc ece ecf ech eck ecs ect eea eeb eec eee eef eek ees eet ef- efa efb efc efe eff efh efs eft eha ehb ehc ehe ehf ehh ehs eht eka ekb ekc eke ekf ekh eks ekt es- esa esb esc ese esf esh esk ess est eta etb etc ete etf eth etk ets ett faa fab fac fae faf fah fak fas fat fba fbb fbc fbe fbf fbh fbk fbs fbt fca fcb fcc fce fcf fck fcs fct fea feb fec fee fef feh fek fes fet ffa ffc ffe fff ffh ffk ffs fft fha fhb fhc fhe fhf fhh fhs fka fkb fkc fkf fkk fkt fsa fsb fsc fse fsf fsh fsk fss fst fta ftb ftc fte ftf fth ftk fts ftt haa hab hac hae haf hah hak has hat hba hbb hbc hbe hbf hbh hbk hbs hbt hca hcb hcc hce hcf hch hck hcs hct he- hea heb hec hee hef heh hek hes het hfa hfb hfc hfe hff hfh hfk hfs hft hha hhb hhc hhe hhf hhh hhk hhs hht hka hkb hkf hkh hkk hks hkt hsa hsb hsc hse hsf hsh hsk hss hst hta htb htc hte htf hth htk hts htt k-t ka- kaa kab kac kae kaf kah kak kas kat kba kbb kbc kbe kbf kbh kbk kbs kca kcb kcc kce kch kck kcs kct ke- kea keb kec kee kef keh kek kes ket kfa kfc kff kfh kfs kha khe khf khh khk khs kkb kkc kke kkh kkk kks kkt ksa ksb ksc kse ksf ksh ksk kss kst kta ktb ktc kte ktf kth ktk kts ktt saa sab sac sae saf sah sak sas sat sba sbb sbc sbe sbf sbh sbk sbs sbt sca scb scc sce scf sch sck scs sct se- sea seb sec see sef seh sek ses set sfa sfb sfc sfe sff sfh sfk sfs sft sh- sha shb shc she shf shh shk shs sht sk- ska skb skc ske skf skh skk sks skt ss- ssa ssb ssc sse ssf ssh ssk sss sst sta stb stc ste stf sth stk sts stt taa tab tac tae taf tah tak tas tat tba tbb tbc tbe tbf tbh tbk tbs tbt tca tcb tcc tce tcf tch tck tcs tct te- tea teb tec tee tef teh tek tes tet tfa tfb tfc tfe tff tfh tfk tfs tft th- tha thb thc the thf thh thk ths tht tka tkb tkc tke tkk tks tkt tsa tsb tsc tse tsf tsh tsk tss tst tta ttb ttc tte ttf tth ttk tts ttt