-er bbb bbc bbd bbe bbk bbo bbr bcb bcc bcd bce bck bco bcr bdb bdc bdd bde bdk bdo bdr be- beb bec bed bee bek beo ber bkb bkc bke bkk bko bkr bob boc bod boe bok boo bor brb brd bre brk bro brr c-- cbb cbc cbd cbe cbk cbo cbr ccb ccc ccd cce cck cco ccr cdb cdc cdd cde cdk cdo cdr ce- ceb cec ced cee cek ceo cer ckb ckc ckd cko co- cob coc cod coe cok coo cor crb crc crd cre crk cro crr dbb dbc dbd dbe dbk dbo dbr dcb dcc dcd dce dck dco dcr ddb ddc ddd dde ddk ddo ddr de- deb dec ded dee dek deo der dkb dkc dke dkk dko dkr dob doc dod doe dok doo dor drb drc drd dre drk dro drr ebb ebc ebd ebe ebk ebo ebr ec- ecb ecc ecd ece eck eco ecr ed- edb edc edd ede edk edo edr eeb eec eed eee eek eeo eer ekb ekc ekd eke eko ekr eo- eob eoc eod eoe eok eoo eor erb erc erd ere erk ero err kbb kbc kbd kbe kbk kbo kbr kcb kcc kcd kce kck kcr kdb kdc kde kdk kdo kdr ke- keb kec ked kee kek keo ker kkb kkc kke kkk kkr kob koc kod koe kok koo kor krc krd krk kro krr ob- obb obc obd obe obk obo obr oc- ocb occ ocd ock oco ocr odb odc odd ode odo odr oeb oec oed oee oeo oer okb okc okd oke okk oko okr oo- oob ooc ood ook ooo oor or- orb orc ord ore ork oro orr rbb rbc rbd rbe rbk rbo rbr rcb rcc rcd rce rco rcr rdb rdc rdd rde rdo rdr re- reb rec red ree rek reo rer rkb rkc rke rkk rko rob roc rod roe rok roo ror rrb rrc rrd rrk rrr

bbbb bbdd bbdo bbeb bbrc bcbc bccc bcde bcec bcer bcor bd-r bdbc bddc bebb bebe bebo beck bede bedo beeb beed beek beer beke beko beo- beod beok beor berc berd bere berk bero berr bobb bobe bobo boce bock boco bodb bode bodo boec boee boeo boer boke boko boob booc bood booe book boor bor- bord bore bork boro borr brcb brce brdo breb brec bred bree brek breo brer brkb brob broc brod broe brok broo bror brrr c-bo c-cd cbbc cbcc cbce cbcr cbdb cbdc cbdo cbec cbee cber cbko cbkr cbrd cbre ccbc cccb cccc ccdc ccdr cced ccee ccob ccoc ccod ccrc ccre cd-e cd-r cddb cddr cdec cder cdre cec- cece ceco cedd cede cedo ceeb ceec ceke ceor cer- cerc cerd cere cero ckbc ckbe ckck ckco ckdo cker ckob ckoc ckoo ckor ckrc ckrd cobb cobe cobo coce cock coco codd code coed cok- coke coko coob cood cook cor- corb corc cord core cork coro corr crbc crcc crce crcr crdc cre- creb crec cred cree creo crkc crob croc crod croe crok croo cror d-bo dbcc dcbc dccb dccc dcdb dcrk dddd ddoc ddrc ddre debe dec- decc decd dece deck deco dedd dede dedo deeb deed deek deer dek- deke deor der- derb derc dere derk dero derr dkdc dobb dobe doce dock doco dod- dodd dode dodo doek doer doke doko doob dood dook door dorc dord dore dork doro dorr drbc dred dree drek drob drod ebbc ebbo ebbr ebcc ebed eber eboe eboo ebor ebro ecbc ecbe eccb eccc ecce ecco ecdc eced ecko eco- ecod ecrc ecrr eddc edde eddo ede- eder edoc edod eede eeee eeke eeoc eerc eero ekco ekeb eked ekek eker eocd eode eore erbb erbe ercc erce erde ereb erec ered erer erke erob eroc erod eroe eroo errc erre erro kbbb kbbc kbbd kbbe kbbk kbbo kbbr kbcb kbce kbck kbco kbcr kbdb kbde kbdo kbdr kbeb kbec kbed kbee kbek kbeo kber kbkb kbkk kbko kbkr kbob kboc kbod kboe kbok kboo kbrb kbrc kbrd kbre kbrk kbro kcbc kcbd kcbk kcbr kccb kccc kccd kcck kccr kcdc kcdd kcdr kceb kcec kced kcee kceo kckc kckk kcko kckr kcob kcoe kcor kcrc kcro kcrr kdbb kdbr kdcc kdcd kdce kdco kdcr kddb kddc kddd kddk kddr kdeb kdec kdkb kdkd kdkk kdko kdkr kdoc kdoe kdok kdrb kdro kebb kebc kebe kebr keck keco kecr kedb kedc kedd kede kedo kedr keed keek keer kekb kekc keke keko keok ker- kerb kerc kere kerk kero kerr kkbb kkbd kkbe kkbo kkbr kkcb kkcd kkck kkco kkcr kkdc kkdd kkdo kked kkkk kkob kkoo kkor kkrb kkrc kkre kkrk kkro kkrr kobb kobc kobe kobk kobo kobr kocb kocd kock kode kodk kodo koed kokb kokc koke kokk koko kokr koob kooc kook kooo koor korb korc kord kore kork koro korr krbb krbd krbe krbk krbr krcb krcc krcd krce krco krdc krdd krde krdo krdr kreb krec kred kree krek kreo krkc krkd krke krkk krko krkr krob kroc krod kroe krok kroo kror krrb krrc krre krrk krro krrr o-eo obbo obec obed ober obkb oboe obok obor obre obro ocbc occc oce oced ocee ocke ocre ocro ocrr odbo oddd oded odeo oder odoo odor oec- oecc oedo oeec oere oked oker okko okok okor okre okro oobe oocr ooer oooo oord oore orbb orbe orbo orce orco orde ordo ore- oreb orec ored orek oreo orer orke orko oro- oroe orok oror orro rbbb rbbr rcbc rcbo rccb rccc rcdc rcde rcrd rder rdoc rebb rebe rebk rebo recc recd rece reck recr redc redd rede redo redr reeb reed reek reke reko reod rerd rere rero rob- robb robe robo rocc roce rock roco rodd rode rodo roed roer roke rokk roko rokr roob rood rook roor rorc rore rork roro rred rrrr

b-e-d b-r-k bbbee bbook bcced bckdk bcock bcode bd-re bdoor be-er be-ro