-er bbb bbc bbd bbe bbf bbk bbn bbr bcb bcc bcd bce bcf bck bcn bcr bdb bdc bdd bde bdf bdk bdr be- beb bec bed bee bef bek ben ber bfb bfc bfd bfe bff bfn bfr bkb bkc bke bkf bkk bkn bkr bnb bnc bnd bne bnf bnk bnn bnr brb brd bre brf brk brn brr c-- cbb cbc cbd cbe cbf cbk cbn cbr ccb ccc ccd cce ccf cck ccn ccr cdb cdc cdd cde cdf cdk cdn cdr ce- ceb cec ced cee cef cek cen cer cfb cfc cfd cfe cff cfk cfn cfr ckb ckc ckd cn- cnb cnc cnd cne cnf cnn cnr crb crc crd cre crf crk crn crr dbb dbc dbd dbe dbf dbk dbn dbr dcb dcc dcd dce dcf dck dcn dcr ddb ddc ddd dde ddf ddk ddn ddr de- deb dec ded dee def dek den der dfb dfc dfd dfe dff dfk dfn dfr dkb dkc dke dkk dkr dnb dnc dnd dne dnf dnk dnn dnr drb drc drd dre drk drn drr ebb ebc ebd ebe ebf ebk ebn ebr ec- ecb ecc ecd ece ecf eck ecn ecr ed- edb edc edd ede edf edk edn edr eeb eec eed eee eef eek een eer ef- efb efc efd efe eff efr ekb ekc ekd eke ekf ekr en- enb enc end ene enf enk enn enr erb erc erd ere erf erk ern err fbb fbc fbd fbe fbf fbk fbn fbr fcb fcc fcd fce fcf fck fcn fcr fdb fdc fdd fde fdf fdk fdn fdr feb fec fed fee fef fek fen fer ffc ffd ffe fff ffk ffn ffr fkb fkc fkf fkk fnb fnc fnd fne fnf fnk fnn fnr frb frc frd fre frf frk frn frr kbb kbc kbd kbe kbf kbk kbn kbr kcb kcc kcd kce kck kcn kcr kdb kdc kde kdf kdk kdr ke- keb kec ked kee kef kek ken ker kfc kfd kff kkb kkc kke kkk kkn kkr kn- knc knd kne knf knk knn knr krc krd krf krk krn krr nbb nbc nbd nbe nbf nbk nbn nbr ncb ncc ncd nce ncf nck ncn ncr ndb ndc ndd nde ndf ndk ndn ndr ne- neb nec ned nee nef nek nen ner nfb nfc nfd nfe nff nfk nfn nfr nkc nke nkf nkk nkn nkr nnb nnc nne nnf nnk nnn nrb nrc nrd nre nrf nrk nrn nrr rbb rbc rbd rbe rbf rbk rbn rbr rcb rcc rcd rce rcf rcn rcr rdb rdc rdd rde rdf rdn rdr re- reb rec red ree ref rek ren rer rfb rfc rfd rfe rff rfk rfn rfr rkb rkc rke rkf rkk rnb rnc rnd rnn rnr rrb rrc rrd rrf rrk rrn rrr

-ene bbbb bbdd bbeb bbfc bbfn bbrc bcbc bccc bcde bcec bcer bcfc bd-r bdbc bddc bebb bebe beck bede beeb beed beef beek been beer befe beff beke bend bene benk benn berc berd bere berk bern berr bner bnrr brcb brce breb brec bred bree bref brek bren brer brfc brkb brrr c-cd cbbc cbcc cbce cbcn cbcr cbdb cbdc cbdn cbec cbee cbef cber cbfb cbfc cbkn cbkr cbnd cbrd cbre cbrn ccbc ccbn cccb cccc cccf ccdc ccdf ccdn ccdr cced ccee ccfc ccfd ccff ccnb ccnc ccne ccnf ccnr ccrc ccre ccrf cd-e cd-r cdbf cddb cddr cdec cdef cder cdfe cdnb cdnc cdnf cdre cec- cece cedd cede ceeb ceec cef- cefc cefn ceke cen- cend cene cer- cerc cerd cere cerf cern cfbc cfbn cfbr cfcb cfcf cfcn cffb cffr cfnb cfnr cfrb cfre cfrn ckbc ckbe ckck cken cker ckfr cknb cknc ckrc ckrd cnbc cndd cnrc cnrr crbc crcc crce crcr crdc cre- creb crec cred cree cren crfc crkc crne dbcc dbfc dbrn dcbc dccb dccc dcdb dcfc dcrk dddd ddrc ddre debe dec- decc decd dece deck dedd dede deeb deed deef deek deen deer defe deff defn dek- deke dene denk denn der- derb derc dere derf derk dern derr dfcc dfer dfrf dkdc dnce dner dnrc drbc dred dree dref drek dren drfc ebbc ebbr ebcc ebed eben eber ebfc ecbc ecbe eccb eccc ecce ecdc ecdf eced ecef ecfc ecfr ecne ecrc ecrf ecrr eddc edde ede- eden eder edrn eede eeee eefe eefn eeke eend eerc efbr efen efke ekeb eked ekek eken eker ekfc ekne enb- enbn enbr ence end- ende ened enee ener enfb enke enkr ennc enne erbb erbe ercc erce erde erdf ereb erec ered eren erer erfc erke erne errc erre f--k fccf fece feck fede fedn feeb feed feek feen feer fefc fefe feff feke fend fene fenk fenn ferb ferc ferd fere ferk fern ferr ffcc ffee ffff ffrr fndd fndn fndr frbc frcc frcn fred free fren frfc kbbb kbbc kbbd kbbe kbbf kbbk kbbr kbcb kbce kbck kbcr kbdb kbde kbdf kbdn kbdr kbeb kbec kbed kbee kbef kbek kben kber kbfb kbfc kbff kbfk kbfr kbkb kbkf kbkk kbkr kbnd kbnn kbnr kbrb kbrc kbrd kbre kbrf kbrk kbrn kcbc kcbd kcbf kcbk kcbr kccb kccc kccd kcck kccr kcdc kcdd kcdr kceb kcec kced kcee kcfb kcfc kcfd kcfn kckc kckf kckk kckn kckr kcnb kcnd kcnr kcrc kcrn kcrr kdbb kdbn kdbr kdcc kdcd kdce kdcr kddb kddc kddd kddf kddk kddr kdeb kdec kdef kden kdfc kdfn kdfr kdkb kdkd kdkk kdkn kdkr kdnd kdne kdnk kdnn kdnr kdrb kdrf kebb kebc kebe kebn kebr keck kecr kedb kedc kedd kede kedr keed keef keek keen keer kefb kefc keff kefr kekb kekc keke ken- kend kene kenk kenn kenr ker- kerb kerc kere kerf kerk kern kerr kfbc kfbk kfbn kfcd kfcf kfcr kfdn kfeb kfed kfer kffb kfff kffk kffn kfkb kfnc kfnf kfnk kfnn kfrc kfrd kfre kfrn kfrr kkbb kkbd kkbe kkbn kkbr kkcb kkcd kkck kkcn kkcr kkdc kkdd kked