-er bbb bbc bbd bbe bbf bbk bbl bbr bcb bcc bcd bce bcf bck bcl bcr bdb bdc bdd bde bdf bdk bdl bdr be- beb bec bed bee bef bek bel ber bfb bfc bfd bfe bff bfl bfr bkb bkc bke bkf bkk bkl bkr blb blc bld ble blf blk bll blr brb brd bre brf brk brl brr c-- cbb cbc cbd cbe cbf cbk cbl cbr ccb ccc ccd cce ccf cck ccl ccr cdb cdc cdd cde cdf cdk cdl cdr ce- ceb cec ced cee cef cek cel cer cfb cfc cfd cfe cff cfk cfl cfr ckb ckc ckd cl- clb clc cld cle clf clk cll clr crb crc crd cre crf crk crl crr dbb dbc dbd dbe dbf dbk dbl dbr dcb dcc dcd dce dcf dck dcl dcr ddb ddc ddd dde ddf ddk ddl ddr de- deb dec ded dee def dek del der dfb dfc dfd dfe dff dfk dfl dfr dkb dkc dke dkk dkl dkr dl- dlb dlc dld dle dlf dlk dll dlr drb drc drd dre drk drl drr ebb ebc ebd ebe ebf ebk ebl ebr ec- ecb ecc ecd ece ecf eck ecl ecr ed- edb edc edd ede edf edk edl edr eeb eec eed eee eef eek eel eer ef- efb efc efd efe eff efl efr ekb ekc ekd eke ekf ekl ekr elb elc eld ele elf elk ell elr erb erc erd ere erf erk erl err fbb fbc fbd fbe fbf fbk fbl fbr fcb fcc fcd fce fcf fck fcl fcr fdb fdc fdd fde fdf fdk fdl fdr feb fec fed fee fef fek fel fer ffc ffd ffe fff ffk ffl ffr fkb fkc fkf fkk fkl flb flc fld fle flf fll flr frb frc frd fre frf frk frl frr kbb kbc kbd kbe kbf kbk kbl kbr kcb kcc kcd kce kck kcl kcr kdb kdc kde kdf kdk kdl kdr ke- keb kec ked kee kef kek kel ker kfc kfd kff kkb kkc kke kkk kkl kkr kl- klb klc kld klf klr krc krd krf krk krl krr lbb lbc lbd lbe lbf lbk lbl lbr lcb lcc lcd lce lcf lck lcl lcr ldb ldc ldd lde ldf ldk ldl ldr leb lec led lee lef lek lel ler lfb lfc lfd lfe lff lfk lfl lfr lkb lkl lkr llb llc lld lle llf llk lll llr lrb lrc lrd lrf lrk lrr rbb rbc rbd rbe rbf rbk rbl rbr rcb rcc rcd rce rcf rcl rcr rdb rdc rdd rde rdf rdl rdr re- reb rec red ree ref rek rel rer rfb rfc rfd rfe rff rfk rfl rfr rkb rkc rke rkf rkk rlc rld rle rlf rll rlr rrb rrc rrd rrf rrk rrl rrr

bbbb bbdd bbeb bbfc bblb bbrc bcbc bccc bccl bcde bcec bcer bcfc bd-r bdbc bddc bdle bebb bebe beck bede bedl beeb beed beef beek beel beer befe beff beke beld bele belk bell berc berd bere berk berr bffl bldc bldr bleb bled blee blek blfc blkb blkd blrc brcb brce breb brec bred bree bref brek brel brer brfc brkb brrr c-cd cbbc cbcc cbce cbcl cbcr cbdb cbdc cbec cbee cbef cber cbfb cbfc cbkl cbkr cblb cblc cbrd cbre cbrl ccbc cccb cccc cccf cccl ccdc ccdf ccdr cced ccee ccel ccfc ccfd ccff ccfl cclc ccrc ccre ccrf ccrl cd-e cd-r cdbf cddb cddl cddr cdec cdef cder cdfe cdre cec- cece cedd cede ceeb ceec ceel cef- cefc ceke cel- celc cele celf cell cer- cerc cerd cere cerf cerl cfbc cfbr cfcb cfcf cfcl cffb cffr cfrb cfre ckbc ckbe ckck ckcl cker ckfr cklf ckrc ckrd clcd cldc cldr clec cled clee clef clek cler clrd crbc crcc crce crcr crdc cre- creb crec cred cree crfc crfl crkc crkl crlf dbcc dbfc dcbc dccb dccc dccl dcdb dcfc dcrk dddd ddlc ddrc ddre debe dec- decc decd dece deck decl dedd dede deeb deed deef deek deel deer defe deff dek- deke deld dele delf delk dell der- derb derc dere derf derk derr dfcc dfer dfrf dkdc dlbd drbc dred dree dref drek drel drfc e-cl ebbc ebbr ebcc ebed ebel eber ebfc ecbc ecbe eccb eccc ecce eccl ecdc ecdf ecdl eced ecef ecfc ecfr ecrc ecrf ecrl ecrr eddc edde ede- edel eder edfl edle eede eeee eefe eefl eeke eele eerc efbr efke ekeb eked ekek eker ekfc el-b elbe elcb elce elde eldr elec eled elee elef elek eler elfc elfe elke elle erbb erbe ercc erce erde erdf ereb erec ered erel erer erfc erke erld erle erll errc erre f--k fble fccf fdlr fece feck fede feeb feed feek feel feer fefc fefe feff feke feld fele felf felk fell ferb ferc ferd fere ferk ferr ffcc ffee ffff ffrr flcl fldr fled flee fler frbc frcc fred free frfc kbbb kbbc kbbd kbbe kbbf kbbk kbbl kbbr kbcb kbce kbck kbcl kbcr kbdb kbde kbdf kbdl kbdr kbeb kbec kbed kbee kbef kbek kbel kber kbfb kbfc kbff kbfk kbfl kbfr kbkb kbkf kbkk kbkl kbkr kblb kbld kble kblf kbll kblr kbrb kbrc kbrd kbre kbrf kbrk kbrl kcbc kcbd kcbf kcbk kcbl kcbr kccb kccc kccd kcck kccl kccr kcdc kcdd kcdr kceb kcec kced kcee kcel kcfb kcfc kcfd kcfl kckc kckf kckk kckl kckr kclc kcle kclf kclk kcll kclr kcrc kcrr kdbb kdbl kdbr kdcc kdcd kdce kdcr kddb kddc kddd kddf kddk kddl kddr kdeb kdec kdef kdel kdfc kdfr kdkb kdkd kdkk kdkr kdlb kdlc kdld kdlf kdll kdlr kdrb kdrf kdrl kebb kebc kebe kebr keck kecr kedb kedc kedd kede kedr keed keef keek keel keer kefb kefc keff kefr kekb kekc keke kekl keld kele kelf kelk kell ker- kerb kerc kere kerf kerk kerl kerr kfbc kfbk kfcd kfcf kfcr kfeb kfed kfel