-er b-u bbb bbc bbd bbe bbk bbr bbt bbu bcb bcc bcd bce bck bcr bct bcu bdb bdc bdd bde bdk bdr bdt bdu be- beb bec bed bee bek ber bet beu bkb bkc bke bkk bkr bkt brb brd bre brk brr brt bru btb btc btd bte btk btr btt btu bub buc bud bue buk bur but buu c-- cbb cbc cbd cbe cbk cbr cbt cbu ccb ccc ccd cce cck ccr cct ccu cdb cdc cdd cde cdk cdr cdt cdu ce- ceb cec ced cee cek cer cet ceu ckb ckc ckd ckt crb crc crd cre crk crr crt cru ctb ctc ctd cte ctk ctr ctt ctu cub cuc cud cue cuk cur cut cuu dbb dbc dbd dbe dbk dbr dbt dbu dcb dcc dcd dce dck dcr dct dcu ddb ddc ddd dde ddk ddr ddt ddu de- deb dec ded dee dek der det deu dkb dkc dke dkk dkr dkt dku drb drc drd dre drk drr drt dru dtb dtc dtd dte dtk dtr dtt dtu dub duc dud due duk dur dut ebb ebc ebd ebe ebk ebr ebt ebu ec- ecb ecc ecd ece eck ecr ect ecu ed- edb edc edd ede edk edr edt edu eeb eec eed eee eek eer eet ekb ekc ekd eke ekr ekt eku erb erc erd ere erk err ert eru etb etc etd ete etk etr ett etu eu- eub euc eud eue eur eut k-t kbb kbc kbd kbe kbk kbr kbu kcb kcc kcd kce kck kcr kct kcu kdb kdc kde kdk kdr kdt kdu ke- keb kec ked kee kek ker ket kkb kkc kke kkk kkr kkt kku krc krd krk krr krt kru ktb ktc kte ktk ktr ktt ktu kub kuc kud kue kuk kur kut kuu rbb rbc rbd rbe rbk rbr rbt rbu rcb rcc rcd rce rcr rct rcu rdb rdc rdd rde rdr rdt rdu re- reb rec red ree rek rer ret reu rkb rkc rke rkk rkt rku rrb rrc rrd rrk rrr rrt rru rtb rtc rtd rte rtk rtr rtt rtu rub ruc rud rue ruk rur rut ruu tbb tbc tbd tbe tbk tbr tbt tbu tcb tcc tcd tce tck tcr tct tcu tdb tdc tdd tde tdk tdr tdt tdu te- teb tec ted tee tek ter tet teu tkb tkc tke tkk tkr tkt trb trc trd tre trk trr trt tru ttb ttc ttd tte ttk ttr ttt ttu tub tuc tud tue tuk tur tut tuu ubb ubc ube ubk ubr ubt ubu ucb ucc ucd uce uck ucr uct ucu udb udc udd ude udk udr udt udu ueb uec ued uee uer uet ukb ukc uke ukk ukr uku ur- urb urc urd ure urk urr urt uru utb utc utd ute utk utr utt utu uuc uue uur uut uuu

bbbb bbdd bbeb bbet bbrc bcbc bccc bcde bcec bcer bcet bcru bctc bcuc bd-r bdbc bddc bebb bebe beck becu bede bedu beeb beed beek beer beet beke berc berd bere berk berr bert beru betc bete bett betu beuk beur brcb brce brdt breb brec bred bree brek brer bret brkb brrr brtc bruc brud brue brut btcc btdt btec btek btrc btrt bttb bubb bube bubu bucc buce buck bucu budb budd bude budu buer bueu buke bukk buku bur- burb burd bure burk burr burt buru but- bute butt c-cd cbbc cbcc cbce cbcr cbct cbcu cbdb cbdc cbec cbee cber cbet cbkr cbrd cbre cbrt cbtc ccbc cccb cccc cccu ccdc ccdr cced ccee ccrc ccre ccrt cctb cctc cctt ccuc ccut cd-e cd-r cddb cddr cdec cder cdre cebu cec- cece cect cedd cede cedt cedu ceeb ceec ceke cer- cerc cerd cere cert cet- cete ckbc ckbe ckck ckdu cker ckrc ckrd cktb crbc crbu crcc crce crcr crdc cre- creb crec cred cree cret creu crkc crrt crtc crub crud crue cruk crut ctec ctrc cub- cubb cube cucc cuce cuck cude cued cuek cuer cuk- cuke curb curd cure curr curt cut- cutc cute cutt dbcc dbtt dcbc dccb dccc dcct dccu dcdb dcrk dctc dddd ddrc ddre ddub debe debt debu dec- decc decd dece deck dect dedd dede dedu deeb deed deek deer deet dek- deke der- derb derc dere derk derr dete detk detr deue deuk deur deut dkdc drbc dred dree drek dret drub drue druk drut druu dtcc dted dtek dub- dubb dubc dube dubu duce duck duct dudd dude dudu duer duet duke dukt duku dure durk durt duru dute duur duut ebbc ebbr ebcc ebed eber ebru ebur ecbc ecbe eccb eccc ecce ecct ecdc eced ecrc ecrr ecru ect- ectc eddc edde ede- eder edru educ edur eede eedu eeee eeke eerc eetc eete eetu ekeb eked ekek eker eket ekur erbb erbe ercc erce erde ereb erec ered erer eret erke errc erre ertu erub eruc erur etbc etbr etcc etec etee eter etre ette ettu eubc eucd eude euer eur- eurc eure eurt kbbb kbbc kbbd kbbe kbbk kbbr kbbt kbbu kbcb kbce kbck kbcr kbct kbcu kbdb kbde kbdr kbeb kbec kbed kbee kbek kber kbet kbkb kbkk kbkr kbrb kbrc kbrd kbre kbrk kbrt kbru kbtb kbtc kbte kbtk kbtr kbtt kbub kbuc kbud kbue kbuk kbur kbut kbuu kcbc kcbd kcbk kcbr kcbu kccb kccc kccd kcck kccr kcct kccu kcdc kcdd kcdr kcdu kceb kcec kced kcee kcet kceu kckc kckk kckr kcrc kcrr kcrt kcru kctb kctc kcte kctu kcub kcue kcuk kdbb kdbr kdcc kdcd kdce kdcr kddb kddc kddd kddk kddr kdeb kdec kdet kdkb kdkd kdkk kdkr kdkt kdrb kdtd kdtr kdub kduc kdur kdut kebb kebc kebe kebr kebt kebu keck kecr kedb kedc kedd kede kedr kedt keed keek keer keet kekb kekc keke keku ker- kerb kerc kere kerk kerr kert keru ket- ketc ketd kete ketk ketr kett