-er b-u bbb bbe bbi bbk bbr bbs bbu be- beb bee bei bek ber bes beu bi- bib bie bii bik bir bis biu bkb bke bkk bkr bks brb bre bri brk brr brs bru bsb bse bsi bsk bsr bss bsu bub bue bui buk bur bus buu ebb ebe ebi ebk ebr ebs ebu eeb eee eek eer ees eib eie eii eik eir eis eiu ekb eke eki ekr eks eku erb ere eri erk err ers eru es- esb ese esi esk esr ess esu eu- eub eue eui eur eus ibb ibe ibi ibk ibr ibs ibu ie- iee iei iek ier ies iib iie iii iir iis iiu ikb ike iki ikk ikr iks iku ir- irb ire iri irk irr irs iru is- isb ise isi isk isr iss isu iu- iub iue iui iur ius kbb kbe kbi kbk kbr kbs kbu ke- keb kee kei kek ker kes kib kie kii kik kir kis kiu kkb kke kki kkk kkr kks kku kri krk krr krs kru ksb kse ksi ksk ksr kss ksu kub kue kui kuk kur kus kuu rbb rbe rbi rbk rbr rbs rbu re- reb ree rei rek rer res reu rib rie rii rik rir ris rkb rke rkk rks rku rrb rri rrk rrr rrs rru rsb rse rsi rsk rsr rss rsu rub rue rui ruk rur rus ruu sbb sbe sbi sbk sbr sbs sbu se- seb see sei sek ser ses seu sib sie sii sik sir sis siu sk- skb ske ski skk skr sks sku sr- srb sre sri srk srr srs ss- ssb sse ssi ssk ssr sss ssu sub sue sui suk sur sus suu ubb ube ubi ubk ubr ubs ubu ueb uee uei uer ues uib uie uii uir uis uiu ukb uke uki ukk ukr uku ur- urb ure uri urk urr urs uru usb use usi usk usr uss usu uue uur uus uuu

bbbb bbbs bbeb bebb bebe bebi beeb beek beer bees beik beir beis beke beki beks bere beri berk berr bers beru bes- bese besk bess beuk beur bibb bibe bibi bibs bieb bier bies bieu biis bike biku birb bire biri birk birr birs biru bis- bise bisk biss bisu breb bree brei brek brer bres brie brik bris brkb brrr brrs brsb brsr brue brus bseb bsee bser bses bsse bubb bube bubi bubs bubu buer bueu buie buik buir buis buiu buke buki bukk buku bur- burb bure buri burk burr burs buru buse busi busk buss busu buus ebbr ebbs eber ebes ebis ebru ebur ebus eeee eees eeke eeks eers eese eesi eesk eiei eier eies eike eiki eiks eire eirs eise eisk eiss ekeb ekek eker ekes ekis ekki eksi ekur erbb erbe ereb erei erer eres erie erik eris eriu erke erki erks erre errs erse ersi erub erur erus esbs esee esek eser eses esie esik esis eske esks esku esri esse essi essu esui esus eubi euer eur- eure euse i-be ibes ibie ibis ibri ibss ibus ieie iere ieri iers iesi iesr iesu iies iiie iiii iiis iirs iisi iisr iisu ikee iker ikes ikki ikri iksu ikue irbe iree irer ires iri- irie iris irki irks irre irri irrs irse irus isbe iseb isee iser ises isie isis isku isri isse issi issr isss issu isus iuiu iuse iuss kbbb kbbe kbbi kbbk kbbr kbbs kbbu kbeb kbee kbek kber kbes kbib kbie kbik kbis kbiu kbkb kbkk kbkr kbrb kbre kbri kbrk kbru kbsb kbsi kbsk kbsr kbss kbsu kbub kbue kbuk kbur kbus kbuu kebb kebe kebi kebr kebu keek keer kees keib keii keik keir keis kekb keke keki keks keku ker- kerb kere keri kerk kerr kers keru kesb kesi kesk kesr kess keur keus kibb kibe kibi kibr kibs kibu kier kies kieu kiii kiik kiis kiiu kiki kikk kikr kiku kirb kiri kirk kirr kirs kiru kise kisi kisk kisr kiss kisu kiur kiuu kkbb kkbe kkbi kkbr kkbs kkik kkkk kkrb kkre kkrk kkrr kkrs kkse kksi kksr kkss kksu kkus kkuu krbb krbe krbi krbk krbr kreb kree krei krek kres kreu krib krik kris krke krki krkk krkr krks krku krrb krre krri krrk krrr krrs krse krsk krsr krss krsu krue krui kruk krur ksbi ksbr ksbs ksee ksei ksek kser ksib ksii ksik ksir ksis kskb kske kskk kskr ksks ksku ksrb ksrr ksrs ksse kssi kssr ksss kssu ksub ksue ksui ksuu kubb kube kubr kubs kubu kuei kuek kues kueu kuie kuik kuke kuki kukk kuks kuku kurb kure kuri kurk kurr kurs kuru kusb kusu kuub kuuk kuur kuuu rbbb rbbr rbbs rbis rbss rebb rebe rebk rebs rebu reeb reek rees reii reik reir reis reiu reke reki reks rere reri rers reru rese resi ress reue reuk reus reuu rib- ribe ribs ribu riek rier ries rieu riis rike riki rikk riku rire riri rirs rise risi risk riss risu riue rius rkss rrrr rsbi rsee rsis rsre rubb rube rubi rubs rubu ruer rues ruis ruke ruki rukk ruku rure ruri rurs ruru ruse rusi rusk russ rusu s-ib s-ii sbbs sber sbrk sbse sbsi sbus se-e se-i se-k se-s se-u sebe sebi sebs seeb seek seer sees seeu seie seii seik seir seis seiu seke seki sekk seku serb sere seri serk serr sers seru sese sesi sess seui seur sibe sibi sibs sibu siek sier sies siik sike siki sikr siks siku sire siri sirk sirr sirs siru sise sisi sisk siss sisu siue siui sius skee skei sker skes skie skik skir skis skiu skss skue skui skur sreb sres srib sris srub ssbr ssee sses ssis ssri ssrs sssb sssi ssss sub- subb subi subs suee suer sues sueu suie suir suis suke suki suks suku sur- sure suri surr surs suru sus- suse susi susk suss susu suus u-ie ubbe ubbi ubek uber ubii