-er bbb bbe bbk bbo bbr bbs bbw bbx be- beb bee bek beo ber bes bew bex bkb bke bkk bko bkr bks bkw bkx bob boe bok boo bor bos bow box brb bre brk bro brr brs brw brx bsb bse bsk bso bsr bss bsw bsx bwb bwk bwo bwr bws bxb bxo bxw bxx ebb ebe ebk ebo ebr ebs ebw ebx eeb eee eek eeo eer ees eew eex ekb eke eko ekr eks eo- eob eoe eok eoo eor eos eow erb ere erk ero err ers erw es- esb ese esk eso esr ess esw esx ewb ewe ewk ewo ewr ews eww ex- exe exo exr exs exw exx kbb kbe kbk kbo kbr kbs kbw kbx ke- keb kee kek keo ker kes kew kex kkb kke kkk kkr kks kob koe kok koo kor kos kow krk kro krr krs krw ksb kse ksk kso ksr kss ksw kw- kwk kwo kws kww kxo ob- obb obe obk obo obr obs obw obx oeb oee oeo oer oes oex okb oke okk oko okr oks okw oo- oob ook ooo oor oos oow oox or- orb ore ork oro orr ors orx os- osb ose osk oso osr oss osw osx owb owe owk owo ows oww ox- oxb oxo oxx rbb rbe rbk rbo rbr rbs rbw rbx re- reb ree rek reo rer res rew rex rkb rke rkk rko rks rob roe rok roo ror ros row rox rrb rrk rrr rrs rsb rse rsk rso rsr rss rsw rsx rwb rwe rwr rws rxr rxs sbb sbe sbk sbo sbr sbs sbw sbx se- seb see sek seo ser ses sew sex sk- skb ske skk sko skr sks skw skx sob soe sok soo sor sos sow sox sr- srb sre srk sro srr srs srw srx ss- ssb sse ssk sso ssr sss ssw ssx swb swe swk swo swr sws sxs wbb wbe wbo wbr wbs wbw wbx web wee wek weo wer wes wew wex wkb wke wko wkr wks wkw wob woe wok woo wor wos wow wox wr- wre wrk wro wrr wrs wrw wrx wsb wse wsk wso wsr wss wsw wsx wwe wwo www wxw xbe xbr xbx xee xer xes xew xex xkb xke xks xok xoo xor xos xox xrx xsb xss xxo xxx

-ose bbbb bbbs bbeb bbox bbwr bbws bebb bebe bebo beeb beek beer bees beke beko beks beo- beok beor beos bere berk bero berr bers bes- bese besk beso bess bewe bobb bobe bobo bobs bobw boee boeo boer boes boke boko boks boob booe book boor boos boow boox bor- bore bork boro borr bors borw bose bosk boso boss bowe bowk bowr bows breb bree brek breo brer bres brew brex brkb brob broe brok broo bror bros brow brox brrr brrs brsb brsr brwe bseb bsee bser bses bsos bsse ebbo ebbr ebbs ebbw eber ebes eboe eboo ebor ebos ebow ebox ebro eeee eees eeke eeks eero eers eese eesk ekeb ekek eker ekes ekos ekwe eoes eore eows er-x erbb erbe ereb erer eres erew erke erks erob eroe eroo eros erre erro errs erse erso erws esbo esbs esee esek eseo eser eses eske esko esks eso- esok esos esox esse esso esws ewer ewes ewew ewok ewos ewre exer exes exo- exor exos exrx k-os kbbb kbbe kbbk kbbo kbbr kbbs kbbw kbeb kbee kbek kbeo kber kbes kbew kbex kbkb kbkk kbko kbkr kbkw kbob kboe kbok kboo kbos kbow kbox kbrb kbre kbrk kbro kbrw kbrx kbsb kbsk kbso kbsr kbss kbsw kbsx kbwb kbww kbwx kbxb kbxr kbxs kbxx kebb kebe kebr keek keer kees kekb keke keko keks keok keos ker- kerb kere kerk kero kerr kers kerx kesb kesk keso kesr kess kesw kewb kewe kewr kews kexb kexo kexs kexx kkbb kkbe kkbo kkbr kkbs kkex kkkk kkob kkoo kkor kkow kkrb kkre kkrk kkro kkrr kkrs kkrx kkse kksr kkss kksw kkwb kkwe kkwk kkws kkxk kkxs kkxx kobb kobe kobk kobo kobr kobs koes kokb koke kokk koko kokr koks kokx koob kook kooo koor koos korb kore kork koro korr kors kos- kosb kose koso kosr koss kowb kowe kowr koxe koxr krbb krbe krbk krbr krbw krbx kreb kree krek kreo kres krew krex krke krkk krko krkr krks krkw krkx krob kroe krok kroo kror kros krow krox krrb krre krrk krro krrr krrs krrw krrx krse krsk krsr krss krsw krsx krwb krwk krwr krxb krxk krxo krxr krxw krxx ksbr ksbs ksbw ksee ksek kseo kser ksew ksex kskb kske kskk ksko kskr ksks kskx ksob ksok ksoo ksor ksos ksow ksox ksrb ksro ksrr ksrs ksrw ksrx ksse ksso kssr ksss kssx kswb kswo ksws ksww kwbe kwbw kweb kwee kwes kwkb kwkk kwkr kwkw kwok kwor kwos kwow kwox kwrb kwre kwrk kwro kwrr kwrs kwrw kwrx kwsk kwso kwss kwsw kwsx kwwk kwwr kwws kwwx kwxr kwxs kxbr kxbx kxeo kxew kxex kxkk kxks kxkw kxkx kxok kxoo kxor kxos kxox kxrb kxre kxrk kxro kxrr kxrs kxrx kxsb kxse kxss kxsw kxxe kxxk kxxo kxxr kxxx o-eo obbo ober obes obex obkb oboe obok obor obos obox obre obro obsr obss oere oers oese oker okes okko okok okor okre okro okso oobe ooer ooes oooo ooos oore oose orbb orbe orbo orbs ore- oreb orek oreo orer ores orex orke orko oro- oroe orok oror oros orro orrs orse orsk orso orwe orwo osbe osee osek oser oses osoo osor osos osow osro ossb osse osso ower owes owoe owow owre owse oxer oxes oxo- oxos oxox oxxo rbbb rbbr rbbs rbss rebb rebe rebk rebo rebs reeb reek rees reke reko reks reos rere rero rers rese reso ress rewe rews rexx rkos rkss rob- robb robe robo robs roer roes roke rokk roko rokr roks roob rook roor roos roox rore rork roro