-er bbb bbc bbe bbh bbk bbo bbr bcb bcc bce bch bck bco bcr be- beb bec bee beh bek beo ber bhb bhc bhe bhh bhk bho bhr bkb bkc bke bkk bko bkr bob boc boe boh bok boo bor brb bre brh brk bro brr c-- cbb cbc cbe cbh cbk cbo cbr ccb ccc cce cch cck cco ccr ce- ceb cec cee ceh cek ceo cer ch- chb chc che chh chk cho chr ckb ckc ckh cko co- cob coc coe coh cok coo cor crb crc cre crh crk cro crr ebb ebc ebe ebh ebk ebo ebr ec- ecb ecc ece ech eck eco ecr eeb eec eee eek eeo eer ehb ehc ehe ehh eho ehr ekb ekc eke ekh eko ekr eo- eob eoc eoe eoh eok eoo eor erb erc ere erh erk ero err hbb hbc hbe hbh hbk hbo hbr hcb hcc hce hch hck hco hcr he- heb hec hee heh hek heo her hhb hhc hhe hhh hhk hho hhr hkb hkh hkk hko hkr hob hoc hoe hoh hok hoo hor hr- hrb hrc hre hrh hrk hro hrr kbb kbc kbe kbh kbk kbo kbr kcb kcc kce kch kck kcr ke- keb kec kee keh kek keo ker khe khh khk kho khr kkb kkc kke kkh kkk kkr kob koc koe koh kok koo kor krc krk kro krr ob- obb obc obe obh obk obo obr oc- ocb occ och ock oco ocr oeb oec oee oeh oeo oer ohc ohe ohh oho ohr okb okc oke okk oko okr oo- oob ooc ooh ook ooo oor or- orb orc ore orh ork oro orr rbb rbc rbe rbh rbk rbo rbr rcb rcc rce rch rco rcr re- reb rec ree reh rek reo rer rh- rhb rhc rhe rhh rho rhr rkb rkc rke rkk rko rob roc roe roh rok roo ror rrb rrc rrh rrk rrr

bbbb bbch bbeb bbrc bcbc bccc bcec bcer bche bcor bebb bebe bebo bech beck beeb beek beer behr beke beko beo- beok beor berc bere berk bero berr bhcc bher bhor bobb bobe bobo boce boch bock boco boec boee boeo boer boho bohr boke boko boob booc booe booh book boor bor- bore borh bork boro borr brcb brce breb brec bree brek breo brer brkb brob broc broe broh brok broo bror brrr c-bo cbbc cbcc cbce cbcr cbec cbee cber cbko cbkr cbre cbrh ccbc cccb cccc ccee cche cchr ccob ccoc ccrc ccre cec- cece ceco ceeb ceec ceke ceor cer- cerc cere cero chce chch cheb chec chee cheh chek cher chkb choc choh chok choo chor chrb chrc chro chrr ckbc ckbe ckch ckck ckco cker ckob ckoc ckoo ckor ckrc cobb cobe cobh cobo coce coch cock coco coho cok- coke coko coob cooh cook cor- corb corc core cork coro corr crbc crcc crce crcr cre- creb crec cree creh creo crkc crob croc croe croh crok croo cror ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ecbc ecbe eccb eccc ecce ecco eche echo ecko eco- ecrc ecrr eeee eeke eeoc eerc eero ehcc eheh eher ehre ekch ekco ekeb ekek eker ekho eore erbb erbe ercc erce erch ereb erec erer erhc erke erob eroc eroe eroo errc erre erro hboc hcbc hccb hccc hcch hebb hebe hebo hebr hech heck heeb heek heer hehe heho heke heor herb herc here herk hero herr hhhh hkcc hobe hobo hoce hoch hock hocr hoek hoer hohe hoho hoke hoko hooe hook hoor horc hore hork horo horr hree hrob hrrc kbbb kbbc kbbe kbbk kbbo kbbr kbcb kbce kbch kbck kbco kbcr kbeb kbec kbee kbeh kbek kbeo kber kbhb kbhc kbhe kbhh kbhr kbkb kbkk kbko kbkr kbob kboc kboe kbok kboo kbrb kbrc kbre kbrh kbrk kbro kcbc kcbk kcbr kccb kccc kcck kccr kceb kcec kcee kceo kche kchh kchk kcho kchr kckc kckk kcko kckr kcob kcoe kcoh kcor kcrc kcrh kcro kcrr kebb kebc kebe kebr kech keck keco kecr keeh keek keer kehk kehr kekb kekc keke keko keok ker- kerb kerc kere kerk kero kerr khbc khbr khcb khcc khch khck kheb khec kher khhk khho khke khkk khkr khob khoc khoe khok khor khrk khro khrr kkbb kkbe kkbo kkbr kkcb kkch kkck kkco kkcr kkhb kkhh kkhk kkhr kkkk kkob kkoh kkoo kkor kkrb kkrc kkre kkrh kkrk kkro kkrr kobb kobc kobe kobk kobo kobr kocb koch kock kohh koho kohr kokb kokc koke kokh kokk koko kokr koob kooc kook kooo koor korb korc kore kork koro korr krbb krbe krbk krbr krcb krcc krce krch krco kreb krec kree kreh krek kreo krhc krkc krke krkh krkk krko krkr krob kroc kroe kroh krok kroo kror krrb krrc krre krrk krro krrr o-eo obbo obec ober obkb oboe obok obor obre obrh obro ocbc occc oce ocee oche ocke ocre ocro ocrr oec- oecc oeec oere ohbe ohcc ohee oher ohho ohob ohoh ohok ohre okeh oker okko okok okor okre okro oobe oocr ooer ooho oooh oooo oore orbb orbe orbo orce orch orco ore- oreb orec oreh orek oreo orer orhe orke orko oro- oroe orok oror orro rbbb rbbr rboh rcbc rcbo rccb rccc rchb rebb rebe rebk rebo recc rece rech reck recr reeb reek rehb rehe reke reko rere rero rhce rheb rhee rheo rhob rhoc rhoh rob- robb robe robo rocc roce roch rock roco roer rohe rohr roke rokh rokk roko rokr roob rook roor rorc rore rork roro rrrr

b-r-k bbbee bbook bcock be-er be-ro bebek beber becco beche becho becke beckh beebe beech beeke beher beker bekke bekko bekok berbe berck berec bereh berek berhe berk- berke berko berob beroe berok beror berre bheer bhook bhore bo-bo bo-ho bobek bobko boboc bobok bobr bobre bocce boche bochk bocho bocke bocor boece boeck boeke boero bohok bohor bokeh