-er b-u bbb bbe bbi bbk bbo bbr bbt bbu be- beb bee bei bek beo ber bet beu bi- bib bie bii bik bio bir bit biu bkb bke bkk bko bkr bkt bob boe boi bok boo bor bot bou brb bre bri brk bro brr brt bru btb bte bti btk bto btr btt btu bub bue bui buk buo bur but buu ebb ebe ebi ebk ebo ebr ebt ebu eeb eee eek eeo eer eet eib eie eii eik eio eir eit eiu ekb eke eki eko ekr ekt eku eo- eob eoe eoi eok eoo eor eot eou erb ere eri erk ero err ert eru etb ete eti etk eto etr ett etu eu- eub eue eui eur eut ibb ibe ibi ibk ibo ibr ibt ibu ie- iee iei iek ier iet iib iie iii iio iir iit iiu ikb ike iki ikk iko ikr ikt iku io- iob ioe ioi ioo ior iot iou ir- irb ire iri irk iro irr irt iru itb ite iti itk ito itt itu iu- iub iue iui iur iut k-t kbb kbe kbi kbk kbo kbr kbu ke- keb kee kei kek keo ker ket kib kie kii kik kio kir kit kiu kkb kke kki kkk kkr kkt kku kob koe koi kok koo kor kot kou kri krk kro krr krt kru ktb kte ktk kto ktr ktt ktu kub kue kui kuk kur kut kuu o-i ob- obb obe obi obk obo obr obt obu oeb oee oei oeo oer oet oib oie oii oik oio oir oit oiu okb oke oki okk oko okr oku oo- oob ooi ook ooo oor oot or- orb ore ori ork oro orr ort oru ot- otb ote oti otk oto otr ott otu ou- oue oui ouk ouo our out rbb rbe rbi rbk rbo rbr rbt rbu re- reb ree rei rek reo rer ret reu rib rie rii rik rio rir rit rkb rke rkk rko rkt rku rob roe roi rok roo ror rot rou rrb rri rrk rrr rrt rru rtb rte rti rtk rto rtr rtt rtu rub rue rui ruk ruo rur rut ruu tbb tbe tbi tbk tbo tbr tbt tbu te- teb tee tei tek teo ter tet teu tib tie tii tik tio tir tit tiu tkb tke tkk tko tkr tkt to- tob toe toi tok too tor tot tou trb tre tri trk tro trr trt tru ttb tte tti ttk tto ttr ttt ttu tub tue tui tuk tuo tur tut tuu ubb ube ubi ubk ubo ubr ubt ubu ueb uee uei uer uet uib uie uii uio uir uit uiu ukb uke uki ukk ukr uku uob uoe uok uoo uor uot ur- urb ure uri urk uro urr urt uru utb ute uti utk uto utr utt utu uue uur uut uuu

bbbb bbeb bbet bebb bebe bebi bebo beeb beek beer beet beik beir beit beke beki beko beo- beok beor beot bere beri berk bero berr bert beru bete beti beto bett betu beuk beur bibb bibe bibi bibo bieb bier biet bieu bike biko biku bio- bioi biot biou birb bire biri birk biro birr birt biru bite bito bitt bitu bobb bobe bobi bobo bobu boee boeo boer boet boi- boie boii boit boiu boke boki boko boku boob booe book boor boot bor- bore bori bork boro borr bort boru botb bote boti boto bott boue bouk bour bout breb bree brei brek breo brer bret brie brik brio brit brkb brob broe brok broo bror brot brou brrr brue brut btek btie btob btor btrt bttb bubb bube bubi bubo bubu buer bueu buie buik buir buit buiu buke buki bukk buko buku bur- burb bure buri burk buro burr burt buru but- bute buti buto butt ebbo ebbr eber ebit eboe eboo ebor ebro ebru ebur eeee eeke eero eete eetu eiei eier eike eiki eiko eiou eire eitb eiti eito eitr ekeb ekek eker eket ekki ekoi ekur eoir eore eori eoto erbb erbe ereb erei erer eret erie erik erio erit eriu erke erki erob eroe eroi eroo erre erro ertu erub erur etbr etee eter etik etio etoe etok etre etro ette etti etto ettu etui eubi euer euoi eur- eure euro eurt i-be ibet ibie ibot ibri ibro ibtb ieet ieie ieio iere ieri iett iiie iiii iiio iiit iioi iioo iitr iitt ikee iker ikki ikko ikoo ikri ikue ikuo iobi ioee ioii ioio ioit ioke ioko iooi iooo iore iori iote ioto irbe iree irer iri- irie irio irki irob irre irri irte irti itbe itek iter itet itie itko itoi itoo itor itou itri itto itur iuiu kbbb kbbe kbbi kbbk kbbo kbbr kbbt kbbu kbeb kbee kbek kbeo kber kbet kbib kbie kbik kbio kbit kbiu kbkb kbkk kbko kbkr kbob kboe kboi kbok kboo kbot kbrb kbre kbri kbrk kbro kbrt kbru kbtb kbte kbtk kbto kbtr kbtt kbub kbue kbuk kbur kbut kbuu kebb kebe kebi kebr kebt kebu keek keer keet keib keii keik keio keir kekb keke keki keko keku keok ker- kerb kere keri kerk kero kerr kert keru ket- kete keti ketk keto ketr kett ketu keur kibb kibe kibi kibo kibr kibt kibu kier kieu kiii kiik kiit kiiu kiki kikk kiko kikr kikt kiku kioe kioi kiok kioo kiot kiou kirb kiri kirk kiro kirr kirt kiru kite kiti kito kitr kitt kitu kiur kiuu kkbb kkbe kkbi kkbo kkbr kkbt kkik kkit kkkk kkob kkoo kkor kkot kkrb kkre kkrk kkro kkrr kkrt kktk kktu kkut kkuu kobb kobe kobi kobk kobo kobr kobu koei koii koir koit kokb koke koki kokk koko kokr koku koob kooi kook kooo koor koot koou korb kore kori kork koro korr kort koru kotb kote koti kotk koto kotr kott kotu koub koue koui kour kout kouu krbb krbe krbi krbk krbr krbt kreb kree krei krek