-er b-u bbb bbe bbi bbk bbr bbs bbt bbu be- beb bee bei bek ber bes bet beu bi- bib bie bii bik bir bis bit biu bkb bke bkk bkr bks bkt brb bre bri brk brr brs brt bru bsb bse bsi bsk bsr bss bst bsu btb bte bti btk btr bts btt btu bub bue bui buk bur bus but buu ebb ebe ebi ebk ebr ebs ebt ebu eeb eee eek eer ees eet eib eie eii eik eir eis eit eiu ekb eke eki ekr eks ekt eku erb ere eri erk err ers ert eru es- esb ese esi esk esr ess est esu etb ete eti etk etr ets ett etu eu- eub eue eui eur eus eut ibb ibe ibi ibk ibr ibs ibt ibu ie- iee iei iek ier ies iet iib iie iii iir iis iit iiu ikb ike iki ikk ikr iks ikt iku ir- irb ire iri irk irr irs irt iru is- isb ise isi isk isr iss ist isu itb ite iti itk its itt itu iu- iub iue iui iur ius iut k-t kbb kbe kbi kbk kbr kbs kbu ke- keb kee kei kek ker kes ket kib kie kii kik kir kis kit kiu kkb kke kki kkk kkr kks kkt kku kri krk krr krs krt kru ksb kse ksi ksk ksr kss kst ksu ktb kte ktk ktr kts ktt ktu kub kue kui kuk kur kus kut kuu rbb rbe rbi rbk rbr rbs rbt rbu re- reb ree rei rek rer res ret reu rib rie rii rik rir ris rit rkb rke rkk rks rkt rku rrb rri rrk rrr rrs rrt rru rsb rse rsi rsk rsr rss rst rsu rtb rte rti rtk rtr rts rtt rtu rub rue rui ruk rur rus rut ruu sbb sbe sbi sbk sbr sbs sbt sbu se- seb see sei sek ser ses set seu sib sie sii sik sir sis sit siu sk- skb ske ski skk skr sks skt sku sr- srb sre sri srk srr srs srt ss- ssb sse ssi ssk ssr sss sst ssu stb ste sti stk str sts stt stu sub sue sui suk sur sus sut suu tbb tbe tbi tbk tbr tbs tbt tbu te- teb tee tei tek ter tes tet teu tib tie tii tik tir tis tit tiu tkb tke tkk tkr tks tkt trb tre tri trk trr trs trt tru tsb tse tsi tsk tsr tss tst tsu ttb tte tti ttk ttr tts ttt ttu tub tue tui tuk tur tus tut tuu ubb ube ubi ubk ubr ubs ubt ubu ueb uee uei uer ues uet uib uie uii uir uis uit uiu ukb uke uki ukk ukr uku ur- urb ure uri urk urr urs urt uru usb use usi usk usr uss ust usu utb ute uti utk utr uts utt utu uue uur uus uut uuu

bbbb bbbs bbeb bbet bebb bebe bebi beeb beek beer bees beet beik beir beis beit beke beki beks bere beri berk berr bers bert beru bes- bese besk bess best bete beti bets bett betu beuk beur bibb bibe bibi bibs bieb bier bies biet bieu biis bike biku birb bire biri birk birr birs birt biru bis- bise bisk biss bist bisu bite bits bitt bitu breb bree brei brek brer bres bret brie brik bris brit brkb brrr brrs brsb brsr brst brue brus brut bseb bsee bser bses bset bskt bsse bsts btek btie btrt btss bttb btus bubb bube bubi bubs bubu buer bueu buie buik buir buis buit buiu buke buki bukk buku bur- burb bure buri burk burr burs burt buru buse busi busk buss bust busu but- bute buti buts butt buus ebbr ebbs eber ebes ebis ebit ebru ebur ebus eeee eees eeke eeks eers eese eesi eesk eete eets eetu eiei eier eies eike eiki eiks eire eirs eise eisk eiss eist eitb eiti eitr ekeb ekek eker ekes eket ekis ekki eksi ekur erbb erbe ereb erei erer eres eret erie erik eris erit eriu erke erki erks erre errs erse ersi erst erts ertu erub erur erus esbs esee esek eser eses eset esie esik esis esit eske esks esku esri esse essi esst essu este estr ests esui esus etbr etee eter etes etik etre etsi etsu ette etti ettu etui eubi euer eur- eure eurt euse i-be ibes ibet ibie ibis ibri ibss ibtb ibts ibus ieet ieie iere ieri iers iesi iesr iest iesu iett iies iiie iiii iiis iiit iirs iisi iisr iist iisu iitr iitt ikee iker ikes ikki ikri iksu ikue irbe iree irer ires iri- irie iris irki irks irre irri irrs irse irte irti irts irus isbe isbt iseb isee iser ises iset isie isis isit isku isri isse issi issr isss issu iste isti istr ists isus itbe itbs itek iter ites itet itie itis itri itrs itse itsi itsu itur iuiu iuse iuss iust kbbb kbbe kbbi kbbk kbbr kbbs kbbt kbbu kbeb kbee kbek kber kbes kbet kbib kbie kbik kbis kbit kbiu kbkb kbkk kbkr kbrb kbre kbri kbrk kbrt kbru kbsb kbsi kbsk kbsr kbss kbst kbsu kbtb kbte kbtk kbtr kbts kbtt kbub kbue kbuk kbur kbus kbut kbuu kebb kebe kebi kebr kebt kebu keek keer kees keet keib keii keik keir keis kekb keke keki keks keku ker- kerb kere keri kerk kerr kers kert keru kesb kesi kesk kesr kess kest ket- kete keti ketk ketr kets kett ketu keur keus kibb kibe kibi kibr kibs kibt kibu kier kies kieu kiii kiik kiis kiit kiiu kiki kikk kikr kikt kiku kirb kiri kirk kirr kirs kirt kiru kise kisi kisk kisr kiss kist kisu kite kiti kitr kits kitt kitu kiur kiuu kkbb kkbe kkbi kkbr kkbs kkbt kkik kkit kkkk kkrb kkre kkrk kkrr kkrs kkrt kkse kksi kksr kkss kkst