-er bbb bbc bbd bbe bbf bbk bbo bbr bcb bcc bcd bce bcf bck bco bcr bdb bdc bdd bde bdf bdk bdo bdr be- beb bec bed bee bef bek beo ber bfb bfc bfd bfe bff bfo bfr bkb bkc bke bkf bkk bko bkr bob boc bod boe bof bok boo bor brb brd bre brf brk bro brr c-- cbb cbc cbd cbe cbf cbk cbo cbr ccb ccc ccd cce ccf cck cco ccr cdb cdc cdd cde cdf cdk cdo cdr ce- ceb cec ced cee cef cek ceo cer cfb cfc cfd cfe cff cfk cfo cfr ckb ckc ckd cko co- cob coc cod coe cof cok coo cor crb crc crd cre crf crk cro crr dbb dbc dbd dbe dbf dbk dbo dbr dcb dcc dcd dce dcf dck dco dcr ddb ddc ddd dde ddf ddk ddo ddr de- deb dec ded dee def dek deo der dfb dfc dfd dfe dff dfk dfo dfr dkb dkc dke dkk dko dkr dob doc dod doe dof dok doo dor drb drc drd dre drk dro drr ebb ebc ebd ebe ebf ebk ebo ebr ec- ecb ecc ecd ece ecf eck eco ecr ed- edb edc edd ede edf edk edo edr eeb eec eed eee eef eek eeo eer ef- efb efc efd efe eff efo efr ekb ekc ekd eke ekf eko ekr eo- eob eoc eod eoe eof eok eoo eor erb erc erd ere erf erk ero err fbb fbc fbd fbe fbf fbk fbo fbr fcb fcc fcd fce fcf fck fco fcr fdb fdc fdd fde fdf fdk fdo fdr feb fec fed fee fef fek feo fer ffc ffd ffe fff ffk ffo ffr fkb fkc fkf fkk fob foc foe fof fok foo for frb frc frd fre frf frk fro frr kbb kbc kbd kbe kbf kbk kbo kbr kcb kcc kcd kce kck kcr kdb kdc kde kdf kdk kdo kdr ke- keb kec ked kee kef kek keo ker kfc kfd kff kfo kkb kkc kke kkk kkr kob koc kod koe kof kok koo kor krc krd krf krk kro krr ob- obb obc obd obe obf obk obo obr oc- ocb occ ocd ocf ock oco ocr odb odc odd ode odf odo odr oeb oec oed oee oef oeo oer of- ofb ofc ofd ofe off ofo ofr okb okc okd oke okk oko okr oo- oob ooc ood oof ook ooo oor or- orb orc ord ore orf ork oro orr rbb rbc rbd rbe rbf rbk rbo rbr rcb rcc rcd rce rcf rco rcr rdb rdc rdd rde rdf rdo rdr re- reb rec red ree ref rek reo rer rfb rfc rfd rfe rff rfk rfo rfr rkb rkc rke rkf rkk rko rob roc rod roe rof rok roo ror rrb rrc rrd rrf rrk rrr

bbbb bbdd bbdo bbeb bbfc bbrc bcbc bccc bcde bcec bcer bcfc bcof bcor bd-r bdbc bddc bebb bebe bebo beck bede bedo beeb beed beef beek beer befe beff befo beke beko beo- beod beof beok beor berc berd bere berk bero berr bobb bobe bobo boce bock boco bodb bode bodo boec boee boef boeo boer bofd bofe boff boke boko boob booc bood booe boof book boor bor- bord bore borf bork boro borr brcb brce brdo breb brec bred bree bref brek breo brer brfc brkb brob broc brod broe brok broo bror brrr c-bo c-cd cbbc cbcc cbce cbcr cbdb cbdc cbdo cbec cbee cbef cber cbfb cbfc cbko cbkr cbrd cbre ccbc cccb cccc cccf ccdc ccdf ccdr cced ccee ccfc ccfd ccff ccob ccoc ccod ccrc ccre ccrf cd-e cd-r cdbf cddb cddr cdec cdef cder cdfe cdre cec- cece ceco cedd cede cedo ceeb ceec cef- cefc ceke ceor cer- cerc cerd cere cerf cero cfbc cfbr cfcb cfcf cfco cffb cffr cfor cfrb cfre ckbc ckbe ckck ckco ckdo cker ckfr ckob ckoc ckoo ckor ckrc ckrd cobb cobe cobo coce cock coco codd code coed cofc cofe coff cok- coke coko coob cood coof cook cor- corb corc cord core corf cork coro corr crbc crcc crce crcr crdc cre- creb crec cred cree creo crfc crkc crob croc crod croe crok croo cror d-bo dbcc dbfc dbfo dcbc dccb dccc dcdb dcfc dcrk dddd ddoc ddrc ddre debe dec- decc decd dece deck deco dedd dede dedo deeb deed deef deek deer defe deff defo dek- deke deor der- derb derc dere derf derk dero derr dfcc dfco dfer dfoe dfrf dkdc dobb dobe doce dock doco dod- dodd dode dodo doek doer doff doke doko doob dood doof dook door dorc dord dore dorf dork doro dorr drbc dred dree dref drek drfc drob drod drof ebbc ebbo ebbr ebcc ebed eber ebfc eboe eboo ebor ebro ecbc ecbe eccb eccc ecce ecco ecdc ecdf eced ecef ecfc ecfr ecko eco- ecod ecrc ecrf ecrr eddc edde eddo ede- eder edoc edod eede eeee eefe eeke eeoc eerc eero efbr efco efeo efke efor ekco ekeb eked ekek eker ekfc eocd eode eore erbb erbe ercc erce erde erdf ereb erec ered erer erfc erke erob eroc erod eroe eroo errc erre erro f--k fccf fdoc febo fece feck fede feeb feed feek feer fefc fefe feff fefo feke feko feod feof ferb ferc ferd fere ferk fero ferr ffcc ffee ffff ffrr foce fock foco fode foed foer fofo foke food foof fook for- forb ford fore fork foro forr frbc frcc fred free freo frfc frob froe kbbb kbbc kbbd kbbe kbbf kbbk kbbo kbbr kbcb kbce kbck kbco kbcr kbdb kbde kbdf kbdo kbdr kbeb kbec kbed kbee kbef kbek kbeo kber kbfb kbfc kbff kbfk kbfo kbfr kbkb kbkf kbkk kbko kbkr kbob kboc kbod kboe kbok kboo kbrb kbrc kbrd kbre kbrf kbrk kbro kcbc kcbd kcbf kcbk kcbr kccb kccc kccd kcck kccr kcdc kcdd