-th a-a a-b a-c a-t aaa aab aac aae aah aak aas aat ab- aba abb abc abe abh abk abs abt ac- aca acb acc ace ach ack acs act aea aeb aec aee aeh aek aes aet aha ahb ahc ahe ahh ahk ahs aht aka akb akc ake akh akk aks as- asa asb asc ase ash ask ass ast at- ata atb atc ate ath ats att baa bab bac bae bah bak bas bat bba bbb bbc bbe bbh bbk bbs bbt bca bcb bcc bce bch bck bcs bct be- bea beb bec bee beh bek bes bet bha bhb bhc bhe bhh bhk bhs bht bka bkb bkc bke bkk bks bkt bsa bsb bsc bse bsh bsk bss bst bta btb btc bte bth btk bts btt c-- caa cab cac cae cah cak cas cat cba cbb cbc cbe cbh cbk cbs cbt cca ccb ccc cce cch cck ccs cct ce- cea ceb cec cee ceh cek ces cet ch- cha chb chc che chh chk chs cht cka ckb ckc ckh cks ckt csa csb csc cse csh csk css cst cta ctb ctc cte cth ctk cts ctt eaa eab eac eae eah eak eas eat eba ebb ebc ebe ebh ebk ebs ebt ec- eca ecb ecc ece ech eck ecs ect eea eeb eec eee eek ees eet eha ehb ehc ehe ehh ehs eht eka ekb ekc eke ekh eks ekt es- esa esb esc ese esh esk ess est eta etb etc ete eth etk ets ett haa hab hac hae hah hak has hat hba hbb hbc hbe hbh hbk hbs hbt hca hcb hcc hce hch hck hcs hct he- hea heb hec hee heh hek hes het hha hhb hhc hhe hhh hhk hhs hht hka hkb hkh hkk hks hkt hsa hsb hsc hse hsh hsk hss hst hta htb htc hte hth htk hts htt k-t ka- kaa kab kac kae kah kak kas kat kba kbb kbc kbe kbh kbk kbs kca kcb kcc kce kch kck kcs kct ke- kea keb kec kee keh kek kes ket kha khe khh khk khs kkb kkc kke kkh kkk kks kkt ksa ksb ksc kse ksh ksk kss kst kta ktb ktc kte kth ktk kts ktt saa sab sac sae sah sak sas sat sba sbb sbc sbe sbh sbk sbs sbt sca scb scc sce sch sck scs sct se- sea seb sec see seh sek ses set sh- sha shb shc she shh shk shs sht sk- ska skb skc ske skh skk sks skt ss- ssa ssb ssc sse ssh ssk sss sst sta stb stc ste sth stk sts stt taa tab tac tae tah tak tas tat tba tbb tbc tbe tbh tbk tbs tbt tca tcb tcc tce tch tck tcs tct te- tea teb tec tee teh tek tes tet th- tha thb thc the thh thk ths tht tka tkb tkc tke tkk tks tkt tsa tsb tsc tse tsh tsk tss tst tta ttb ttc tte tth ttk tts ttt