-er -th a-a a-b a-c a-t aaa aab aac aae aah aak aar aas aat ab- aba abb abc abe abh abk abr abs abt ac- aca acb acc ace ach ack acr acs act aea aeb aec aee aeh aek aer aes aet aha ahb ahc ahe ahh ahk ahr ahs aht aka akb akc ake akh akk akr aks ar- ara arb arc are arh ark arr ars art as- asa asb asc ase ash ask asr ass ast at- ata atb atc ate ath atr ats att baa bab bac bae bah bak bar bas bat bba bbb bbc bbe bbh bbk bbr bbs bbt bca bcb bcc bce bch bck bcr bcs bct be- bea beb bec bee beh bek ber bes bet bha bhb bhc bhe bhh bhk bhr bhs bht bka bkb bkc bke bkk bkr bks bkt bra brb bre brh brk brr brs brt bsa bsb bsc bse bsh bsk bsr bss bst bta btb btc bte bth btk btr bts btt c-- caa cab cac cae cah cak car cas cat cba cbb cbc cbe cbh cbk cbr cbs cbt cca ccb ccc cce cch cck ccr ccs cct ce- cea ceb cec cee ceh cek cer ces cet ch- cha chb chc che chh chk chr chs cht cka ckb ckc ckh cks ckt cra crb crc cre crh crk crr crs crt csa csb csc cse csh csk csr css cst cta ctb ctc cte cth ctk ctr cts ctt eaa eab eac eae eah eak ear eas eat eba ebb ebc ebe ebh ebk ebr ebs ebt ec- eca ecb ecc ece ech eck ecr ecs ect eea eeb eec eee eek eer ees eet eha ehb ehc ehe ehh ehr ehs eht eka ekb ekc eke ekh ekr eks ekt era erb erc ere erh erk err ers ert es- esa esb esc ese esh esk esr ess est eta etb etc ete eth etk etr ets ett haa hab hac hae hah hak har has hat hba hbb hbc hbe hbh hbk hbr hbs hbt hca hcb hcc hce hch hck hcr hcs hct he- hea heb hec hee heh hek her hes het hha hhb hhc hhe hhh hhk hhr hhs hht hka hkb hkh hkk hkr hks hkt hr- hra hrb hrc hre hrh hrk hrr hrs hrt hsa hsb hsc hse hsh hsk hsr hss hst hta htb htc hte hth htk htr hts htt k-t ka- kaa kab kac kae kah kak kar kas kat kba kbb kbc kbe kbh kbk kbr kbs kca kcb kcc kce kch kck kcr kcs kct ke- kea keb kec kee keh kek ker kes ket kha khe khh khk khr khs kkb kkc kke kkh kkk kkr kks kkt kra krc krk krr krs krt ksa ksb ksc kse ksh ksk ksr kss kst kta ktb ktc kte kth ktk ktr kts ktt ra- raa rab rac rae rah rak rar ras rat rba rbb rbc rbe rbh rbk rbr rbs rbt rca rcb rcc rce rch rcr rcs rct re- rea reb rec ree reh rek rer res ret rh- rha rhb rhc rhe rhh rhr rhs rht rkb rkc rke rkk rks rkt rra rrb rrc rrh rrk rrr rrs rrt rsa rsb rsc rse rsh rsk rsr rss rst rta rtb rtc rte rtk rtr rts rtt saa sab sac sae sah sak sar sas sat sba sbb sbc sbe sbh sbk sbr sbs sbt sca scb scc sce sch sck scr scs sct se- sea seb sec see seh sek ser ses set sh- sha shb shc she shh shk shr shs sht sk- ska skb skc ske skh skk skr sks skt sr- sra srb src sre srh srk srr srs srt ss- ssa ssb ssc sse ssh ssk ssr sss sst sta stb stc ste sth stk str sts stt taa tab tac tae tah tak tar tas tat tba tbb tbc tbe tbh tbk tbr tbs tbt tca tcb tcc tce tch tck tcr tcs tct te- tea teb tec tee teh tek ter tes tet th- tha thb thc the thh thk thr ths tht tka tkb tkc tke tkk tkr tks tkt tra trb trc tre trh trk trr trs trt tsa tsb tsc tse tsh tsk tsr tss tst tta ttb ttc tte tth ttk ttr tts ttt