-er b-p bbb bbe bbk bbo bbp bbr bbt bbx be- beb bee bek beo bep ber bet bex bkb bke bkk bko bkp bkr bkt bkx bob boe bok boo bop bor bot box bpb bpe bpo bpp bpr bpt bpx brb bre brk bro brp brr brt brx btb bte btk bto btp btr btt btx bxb bxo bxx ebb ebe ebk ebo ebp ebr ebt ebx eeb eee eek eeo eep eer eet eex ekb eke eko ekp ekr ekt eo- eob eoe eok eoo eop eor eot ep- epb epe epo epp epr ept epx erb ere erk ero erp err ert etb ete etk eto etp etr ett etx ex- exe exo exp exr ext exx k-t kbb kbe kbk kbo kbp kbr kbx ke- keb kee kek keo kep ker ket kex kkb kke kkk kkp kkr kkt kob koe kok koo kop kor kot kpe kpk kpo kpp kpr kpt krk kro krp krr krt ktb kte ktk kto ktp ktr ktt kxo ob- obb obe obk obo obp obr obt obx oeb oee oeo oep oer oet oex okb oke okk oko okp okr oo- oob ook ooo oop oor oot oox op- opb ope opk opo opp opr opt opx or- orb ore ork oro orp orr ort orx ot- otb ote otk oto otp otr ott ox- oxb oxo oxt oxx p-p pbb pbe pbk pbo pbp pbr pbt pbx peb pee pek peo pep per pet pex pkb pke pko pkp pkr pkt pob poe pok poo pop por pot pox ppb ppe ppk ppo ppp ppr ppt ppx prb pre prk pro prp prr prt prx pt- ptb pte ptk pto ptp ptr ptt ptx pxe pxk pxr pxt rbb rbe rbk rbo rbp rbr rbt rbx re- reb ree rek reo rep rer ret rex rkb rke rkk rko rkp rkt rob roe rok roo rop ror rot rox rpb rpe rpk rpo rpp rpr rpt rpx rrb rrk rrp rrr rrt rtb rte rtk rto rtp rtr rtt rtx rxp rxr t-x tbb tbe tbk tbo tbp tbr tbt te- teb tee tek teo tep ter tet tex tkb tke tkk tko tkp tkr tkt to- tob toe tok too top tor tot tox tpb tpe tpk tpo tpp tpr tpt tpx trb tre trk tro trp trr trt trx ttb tte ttk tto ttp ttr ttt ttx txe txk txt xbe xbr xbx xee xep xer xet xex xkb xke xok xoo xop xor xot xox xpb xpe xpo xpp xpt xrt xrx xtp xtr xtx xxo xxp xxx

bbbb bbeb bbet bbox bbpr bebb bebe bebo beeb beek beep beer beet beke beko beo- beok beor beot bepo bere berk bero berr bert bete beto bett bkpr bkpt bobb bobe bobo boee boeo boep boer boet boke boko boob booe book boop boor boot boox bope bopp bor- bore bork boro borr bort botb bote boto bott bpoe bpot breb bree brek breo brep brer bret brex brkb brob broe brok broo bror brot brox brrr btbp btek btex btob btor btrt bttb ebbo ebbr eber eboe eboo ebor ebox ebpo ebro eeee eeke eero eete eext ekeb ekek eker eket ekpe ekpo eore eoto epee eper epor epot epox eppo eppp eprb epro eprp epte epxp er-x erbb erbe ereb erer eret erke erob eroe eroo erpe erre erro etbr etee eter etoe etok etox etre etro ette etto exer exo- exor expo expr expt exrx exte extr kbbb kbbe kbbk kbbo kbbr kbbt kbeb kbee kbek kbeo kber kbet kbex kbkb kbkk kbko kbkr kbob kboe kbok kboo kbot kbox kbpe kbpk kbpo kbpr kbpt kbrb kbre kbrk kbro kbrt kbrx kbtb kbte kbtk kbto kbtr kbtt kbxb kbxr kbxt kbxx kebb kebe kebr kebt keek keep keer keet kekb keke keko keok kep- kepe kept kepx ker- kerb kere kerk kero kerp kerr kert kerx ket- kete ketk keto ketp ketr kett ketx kexb kexo kexx kkbb kkbe kkbo kkbr kkbt kkex kkkk kkob kkoo kkor kkot kkpk kkpt kkrb kkre kkrk kkro kkrr kkrt kkrx kktk kktx kkxk kkxt kkxx kobb kobe kobk kobo kobr kokb koke kokk koko kokp kokr kokx koob kook kooo koop koor koot kopb kope kopp kopr kopt korb kore kork koro korr kort kotb kote kotk koto kotr kott koxe koxr kpbb kpbe kpbr kpbx kpek kper kpet kpke kpkk kpkr kpkx kpob kpoe kpok kpoo kpop kppk kppo kppp kppr kprb kpre kprk kpro kprp kprr kprt kpte kpto kptr kptt kptx kpxp kpxr krbb krbe krbk krbr krbt krbx kreb kree krek kreo kret krex krke krkk krko krkr krkx krob kroe krok kroo krop kror krox krpr krpt krpx krrb krre krrk krro krrr krrt krrx krtk krto krtr krtx krxb krxk krxo krxp krxr krxt krxx ktbb ktbr ktbt ktee ktek ktep ktex ktkb ktke ktkk ktko ktkr ktkt ktkx ktob ktoe ktok ktoo ktop ktor ktot ktox ktpk ktpo ktpr ktpt ktrb ktre ktrk ktro ktrp ktrr ktrt ktrx kttk ktto kttp kttr kttt kttx ktxb ktxk ktxo ktxp ktxr ktxt kxbr kxbt kxbx kxeo kxet kxex kxkk kxkt kxkx kxok kxoo kxor kxox kxpk kxpo kxpr kxpt kxrb kxre kxrk kxro kxrp kxrr kxrx kxte kxtk kxto kxtt kxtx kxxe kxxk kxxo kxxr kxxt kxxx o-eo obbo ober obet obex obkb oboe obok obor obot obox obre obro oere oker oket okko okok okor okot okpe okpo okre okro okto oobe ooer oooo oore oort ootb ootp opep oper opet opex opo- opor oppo opto orbb orbe orbo ore- oreb orek oreo orer orex orke orko oro- oroe orok oror orot orpe orro orte orto otee otep oter oto- otoe otok otoo otor otpp otre otro otte otto oxep oxer oxo- oxox oxxo pbpk peek peep peer peet peke pekk peko peor pepe pepo per- pere perk pero perp perr pert pete peto petr pett pobo poer poet poke poko pook poop poor poot pop- pope popo popp