-er -th a-a a-b a-c a-t aaa aab aac aae aah aak aar aat ab- aba abb abc abe abh abk abr abt ac- aca acb acc ace ach ack acr act aea aeb aec aee aeh aek aer aet aha ahb ahc ahe ahh ahk ahr aht aka akb akc ake akh akk akr ar- ara arb arc are arh ark arr art at- ata atb atc ate ath atr att baa bab bac bae bah bak bar bat bba bbb bbc bbe bbh bbk bbr bbt bca bcb bcc bce bch bck bcr bct be- bea beb bec bee beh bek ber bet bha bhb bhc bhe bhh bhk bhr bht bka bkb bkc bke bkk bkr bkt bra brb bre brh brk brr brt bta btb btc bte bth btk btr btt c-- caa cab cac cae cah cak car cat cba cbb cbc cbe cbh cbk cbr cbt cca ccb ccc cce cch cck ccr cct ce- cea ceb cec cee ceh cek cer cet ch- cha chb chc che chh chk chr cht cka ckb ckc ckh ckt cra crb crc cre crh crk crr crt cta ctb ctc cte cth ctk ctr ctt eaa eab eac eae eah eak ear eat eba ebb ebc ebe ebh ebk ebr ebt ec- eca ecb ecc ece ech eck ecr ect eea eeb eec eee eek eer eet eha ehb ehc ehe ehh ehr eht eka ekb ekc eke ekh ekr ekt era erb erc ere erh erk err ert eta etb etc ete eth etk etr ett haa hab hac hae hah hak har hat hba hbb hbc hbe hbh hbk hbr hbt hca hcb hcc hce hch hck hcr hct he- hea heb hec hee heh hek her het hha hhb hhc hhe hhh hhk hhr hht hka hkb hkh hkk hkr hkt hr- hra hrb hrc hre hrh hrk hrr hrt hta htb htc hte hth htk htr htt k-t ka- kaa kab kac kae kah kak kar kat kba kbb kbc kbe kbh kbk kbr kca kcb kcc kce kch kck kcr kct ke- kea keb kec kee keh kek ker ket kha khe khh khk khr kkb kkc kke kkh kkk kkr kkt kra krc krk krr krt kta ktb ktc kte kth ktk ktr ktt ra- raa rab rac rae rah rak rar rat rba rbb rbc rbe rbh rbk rbr rbt rca rcb rcc rce rch rcr rct re- rea reb rec ree reh rek rer ret rh- rha rhb rhc rhe rhh rhr rht rkb rkc rke rkk rkt rra rrb rrc rrh rrk rrr rrt rta rtb rtc rte rtk rtr rtt taa tab tac tae tah tak tar tat tba tbb tbc tbe tbh tbk tbr tbt tca tcb tcc tce tch tck tcr tct te- tea teb tec tee teh tek ter tet th- tha thb thc the thh thk thr tht tka tkb tkc tke tkk tkr tkt tra trb trc tre trh trk trr trt tta ttb ttc tte tth ttk ttr ttt