-ic bbb bbc bbd bbi bbk bbo bbr bbs bcb bcc bcd bci bck bco bcr bcs bdb bdc bdd bdi bdk bdo bdr bds bi- bib bic bid bii bik bio bir bis bkb bkc bkk bko bkr bks bob boc bod boi bok boo bor bos brb brd bri brk bro brr brs bsb bsc bsd bsi bsk bso bsr bss c-- cbb cbc cbd cbi cbk cbo cbr cbs ccb ccc ccd cci cck cco ccr ccs cdb cdc cdd cdi cdk cdo cdr cds ci- cib cic cid cii cik cio cir cis ckb ckc ckd cki cko cks co- cob coc cod coi cok coo cor cos crb crc crd cri crk cro crr crs csb csc csd csi csk cso csr css dbb dbc dbd dbi dbk dbo dbr dbs dcb dcc dcd dci dck dco dcr dcs ddb ddc ddd ddi ddk ddo ddr dds di- dib dic did dii dik dio dir dis dkb dkc dki dkk dko dkr dks dob doc dod doi dok doo dor dos drb drc drd dri drk dro drr drs dsb dsc dsd dsi dsk dso dsr dss i-d ibb ibc ibd ibi ibk ibo ibr ibs icb icc icd ici ick ico icr ics idb idc idd idi idk ido idr ids iib iic iid iii iio iir iis ikb ikc iki ikk iko ikr iks io- iob ioc iod ioi ioo ior ios ir- irb irc ird iri irk iro irr irs is- isb isc isd isi isk iso isr iss kbb kbc kbd kbi kbk kbo kbr kbs kcb kcc kcd kci kck kcr kcs kdb kdc kdk kdo kdr kds kib kic kid kii kik kio kir kis kkb kkc kki kkk kkr kks kob koc kod koi kok koo kor kos krc krd kri krk kro krr krs ksb ksc ksd ksi ksk kso ksr kss o-i ob- obb obc obd obi obk obo obr obs oc- ocb occ ocd oci ock oco ocr ocs odb odc odd odi odo odr ods oib oic oid oii oik oio oir ois okb okc okd oki okk oko okr oks oo- oob ooc ood ooi ook ooo oor oos or- orb orc ord ori ork oro orr ors os- osb osc osd osi osk oso osr oss rbb rbc rbd rbi rbk rbo rbr rbs rcb rcc rcd rci rco rcr rcs rdb rdc rdd rdi rdo rdr rds rib ric rid rii rik rio rir ris rkb rkc rkk rko rks rob roc rod roi rok roo ror ros rrb rrc rrd rri rrk rrr rrs rsb rsc rsd rsi rsk rso rsr rss sbb sbc sbd sbi sbk sbo sbr sbs scb scc scd sci sck sco scr scs sdb sdc sdd sdi sdk sdo sdr sds sib sic sid sii sik sio sir sis sk- skb skc skd ski skk sko skr sks sob soc sod soi sok soo sor sos sr- srb src srd sri srk sro srr srs ss- ssb ssc ssd ssi ssk sso ssr sss

bbbb bbbs bbci bbdd bbdo bbrc bcbc bcbs bccc bcci bccs bcds bcis bcor bcos bcrs bcsc bcss bd-r bdbc bddc bdii bdos bdsd bibb bibi bibo bibs bicc bici bick bico bics bidi bido bidr bids biis biko bio- bioc bioi bios birb bird biri birk biro birr birs bis- bisc bisd bisk biso biss bobb bobi bobo bobs bock boco bocs bodb bodi bodo bods boi- boid boii bois boki boko boks boob booc bood book boor boos bor- bord bori bork boro borr bors bosc bosi bosk boso boss brcb brdo brds bric brid brik brio bris brkb brob broc brod brok broo bror bros brrr brrs brsb brsr bsbd bsci bscs bsic bsod bsos bsrd bssc bssd c-bo c-cd cbbc cbbs cbcc cbcr cbcs cbdb cbdc cbdi cbdo cbds cbid cbir cbko cbkr cbrd cbsc cbsi ccbc cccb cccc ccci cccs ccdc ccdi ccdr ccds ccic ccid ccii ccir ccis ccob ccoc ccod ccrc ccri ccrs ccsd ccsi ccss cd-r cdcs cddb cddr cdic cdii cdio cdis cdos cdrs cdss cibc cibi cibo cicc cici cico cicr cics cidc cidi cidr cids ciid ciii ciis ciko cikr ciob cior cios cirb circ ciri cirk ciro cirr cirs cis- cisc cisd cisk cisr ciss ckbc ckbi ckck ckco ckcs ckdo ckob ckoc ckoi ckoo ckor ckos ckrc ckrd cksb ckso cobb cobi cobo cobs cock coco codd codi cods coir cois cok- coko coob cood cook coos cor- corb corc cord cori cork coro corr cors cosc cosi coso coss crbc crcc crcr crdc crib cric crik cris crkc crob croc crod crok croo cror crss cscb cscc cscd csci csco cscr cscs csdb csdr csib csid csik csio csir csis csks csob csor csos csrc csrd csrs cssd cssr d-bo dbcc dbcs dbos dbrs dbss dcbc dccb dccc dcci dccs dcdb dcds dcii dcio dcis dcos dcrk dcsc dcss dddd ddoc ddrc ddss dibb dibo dibs dici dick dico didi dido dids diii diis diki diko dioc dior dios dird dirk dirr dirs dis- disc disd disi disk diso diss dkdc dkid dobb dobi dobs doci dock doco docs dod- dodd dodi dodo dods doid dois doki doko doob dood dook door doos dorc dord dori dork doro dorr dors dosi dosk doso doss drbc drib dric drob drod drrs dsbc dscc dscr dscs dsdr dsos dsrc dsri dsrr dssc dssi ibcs ibdo ibid ibis ibos ibrc ibrd ibri ibro ibss icbc icbd icbs iccb iccc icci icco iccr iccs icdc icdd icis icks icoc icod icor icos icrc icrr icrs icsb icsc icsd icsi icsr icss idcr iddo idic idid idio idir idis idoc idos idrc idro idsc idso idss iicd iiii iiio iiis iioi iioo iios iirc iirs iisc iisd iisi iisr ikid ikki ikko ikoo ikri iobi ioci iod- iodd iodo ioii ioio ioko iooi iooo ioos iori iors ioso ircc ircd ircs irdc irdo irds iri- iric irid irio iris irki irks irob