-er bbb bbc bbd bbe bbh bbk bbo bbr bcb bcc bcd bce bch bck bco bcr bdb bdc bdd bde bdh bdk bdo bdr be- beb bec bed bee beh bek beo ber bhb bhc bhd bhe bhh bhk bho bhr bkb bkc bke bkk bko bkr bob boc bod boe boh bok boo bor brb brd bre brh brk bro brr c-- cbb cbc cbd cbe cbh cbk cbo cbr ccb ccc ccd cce cch cck cco ccr cdb cdc cdd cde cdh cdk cdo cdr ce- ceb cec ced cee ceh cek ceo cer ch- chb chc chd che chh chk cho chr ckb ckc ckd ckh cko co- cob coc cod coe coh cok coo cor crb crc crd cre crh crk cro crr dbb dbc dbd dbe dbh dbk dbo dbr dcb dcc dcd dce dck dco dcr ddb ddc ddd dde ddh ddk ddo ddr de- deb dec ded dee deh dek deo der dh- dhb dhc dhd dhe dhh dhk dho dhr dkb dkc dke dkk dko dkr dob doc dod doe doh dok doo dor drb drc drd dre drk dro drr ebb ebc ebd ebe ebh ebk ebo ebr ec- ecb ecc ecd ece ech eck eco ecr ed- edb edc edd ede edh edk edo edr eeb eec eed eee eek eeo eer ehb ehc ehd ehe ehh eho ehr ekb ekc ekd eke ekh eko ekr eo- eob eoc eod eoe eoh eok eoo eor erb erc erd ere erh erk ero err hbb hbc hbd hbe hbh hbk hbo hbr hcb hcc hcd hce hch hck hco hcr hdb hdc hdd hde hdh hdk hdo hdr he- heb hec hed hee heh hek heo her hhb hhc hhd hhe hhh hhk hho hhr hkb hkd hkh hkk hko hkr hob hoc hod hoe hoh hok hoo hor hr- hrb hrc hrd hre hrh hrk hro hrr kbb kbc kbd kbe kbh kbk kbo kbr kcb kcc kcd kce kch kck kcr kdb kdc kde kdh kdk kdo kdr ke- keb kec ked kee keh kek keo ker khe khh khk kho khr kkb kkc kke kkh kkk kkr kob koc kod koe koh kok koo kor krc krd krk kro krr ob- obb obc obd obe obh obk obo obr oc- ocb occ ocd och ock oco ocr odb odc odd ode odh odo odr oeb oec oed oee oeh oeo oer ohc ohd ohe ohh oho ohr okb okc okd oke okk oko okr oo- oob ooc ood ooh ook ooo oor or- orb orc ord ore orh ork oro orr rbb rbc rbd rbe rbh rbk rbo rbr rcb rcc rcd rce rch rco rcr rdb rdc rdd rde rdh rdo rdr re- reb rec red ree reh rek reo rer rh- rhb rhc rhd rhe rhh rho rhr rkb rkc rke rkk rko rob roc rod roe roh rok roo ror rrb rrc rrd rrh rrk rrr

bbbb bbch bbdd bbdo bbeb bbrc bcbc bccc bcde bcec bcer bchd bche bcor bd-r bdbc bddc bddh bebb bebe bebo bech beck bede bedo beeb beed beek beer behr beke beko beo- beod beok beor berc berd bere berk bero berr bhcc bher bhor bobb bobe bobo boce boch bock boco bodb bode bodh bodo boec boee boeo boer bohd boho bohr boke boko boob booc bood booe booh book boor bor- bord bore borh bork boro borr brcb brce brdo breb brec bred bree brek breo brer brkb brob broc brod broe broh brok broo bror brrr c-bo c-cd cbbc cbcc cbce cbcr cbdb cbdc cbdo cbec cbee cber cbko cbkr cbrd cbre cbrh ccbc cccb cccc ccdc ccdh ccdr cced ccee cche cchr 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 chce chch cheb chec ched chee cheh chek cher chkb choc chod choh chok choo chor chrb chrc chrd chro chrr ckbc ckbe ckch ckck ckco ckdo cker ckob ckoc ckoo ckor ckrc ckrd cobb cobe cobh cobo coce coch cock coco codd code coed coho cok- coke coko coob cood cooh cook cor- corb corc cord core cork coro corr crbc crcc crce crcr crdc cre- creb crec cred cree creh creo crkc crob croc crod croe croh crok croo cror d-bo dbcc dcbc dccb dccc dcdb dche dcrk dddd ddoc ddrc ddre debe dec- decc decd dece deck deco dedd dede dedo deeb deed deek deer dek- deke dekh deor der- derb derc dere derk dero derr dhec dhed dhee dher dhod dhor dkdc dobb dobe doce doch dock doco dod- dodd dode dodo doek doer dohc dohr doke doko doob dood dook door dorc dord dore dork doro dorr drbc dred dree dreh drek drob drod droh ebbc ebbo ebbr ebcc ebed eber eboe eboo ebor ebro ecbc ecbe eccb eccc ecce ecco ecdc eced eche echo ecko eco- ecod ecrc ecrr eddc edde eddo ede- edeh eder edoc edod eede eeee eeke eeoc eerc eero ehcc ehdd eheh eher ehre ekch ekco ekeb eked ekek eker ekho eocd eode eore erbb erbe ercc erce erch erde ereb erec ered erer erhc erke erob eroc erod eroe eroo errc erre erro hbcd hboc hcbc hccb hccc hcch hcdr hcrd hdbk hdoc hdod hebb hebe hebo hebr hech heck hedd hede hedo heeb heed heek heer hehe heho heke heor herb herc herd here herk hero herr hhhh hkcc hobe hobo hoce hoch hock hocr hode hodh hodk hodr hoed hoek hoer hohe hoho hoke hoko hood hooe hook hoor horc hord hore hork horo horr hrdc hree hrob hrod hrrc kbbb kbbc kbbd kbbe kbbk kbbo kbbr kbcb kbce kbch kbck kbco kbcr kbdb kbde kbdo kbdr kbeb kbec kbed kbee kbeh kbek kbeo kber kbhb kbhc kbhe kbhh kbhr kbkb kbkk kbko kbkr kbob kboc kbod kboe kbok kboo kbrb kbrc kbrd kbre kbrh kbrk kbro kcbc kcbd kcbk kcbr kccb