-er b-u bbb bbd bbe bbk bbr bbs bbu bdb bdd bde bdk bdr bds bdu be- beb bed bee bek ber bes beu bkb bke bkk bkr bks brb brd bre brk brr brs bru bsb bsd bse bsk bsr bss bsu bub bud bue buk bur bus buu dbb dbd dbe dbk dbr dbs dbu ddb ddd dde ddk ddr dds ddu de- deb ded dee dek der des deu dkb dke dkk dkr dks dku drb drd dre drk drr drs dru dsb dsd dse dsk dsr dss dsu dub dud due duk dur dus ebb ebd ebe ebk ebr ebs ebu ed- edb edd ede edk edr eds edu eeb eed eee eek eer ees ekb ekd eke ekr eks eku erb erd ere erk err ers eru es- esb esd ese esk esr ess esu eu- eub eud eue eur eus kbb kbd kbe kbk kbr kbs kbu kdb kde kdk kdr kds kdu ke- keb ked kee kek ker kes kkb kke kkk kkr kks kku krd krk krr krs kru ksb ksd kse ksk ksr kss ksu kub kud kue kuk kur kus kuu rbb rbd rbe rbk rbr rbs rbu rdb rdd rde rdr rds rdu re- reb red ree rek rer res reu rkb rke rkk rks rku rrb rrd rrk rrr rrs rru rsb rsd rse rsk rsr rss rsu rub rud rue ruk rur rus ruu sbb sbd sbe sbk sbr sbs sbu sdb sdd sde sdk sdr sds sdu se- seb sed see sek ser ses seu sk- skb skd ske skk skr sks sku sr- srb srd sre srk srr srs ss- ssb ssd sse ssk ssr sss ssu sub sud sue suk sur sus suu ubb ube ubk ubr ubs ubu udb udd ude udk udr uds udu ueb ued uee uer ues ukb uke ukk ukr uku ur- urb urd ure urk urr urs uru usb usd use usk usr uss usu uue uur uus uuu

bbbb bbbs bbdd bbeb bd-r bdes bdsd bebb bebe bede beds bedu beeb beed beek beer bees beke beks berd bere berk berr bers beru bes- bese besk bess beuk beur brds breb bred bree brek brer bres brkb brrr brrs brsb brsr brud brue brus bsbd bseb bsed bsee bser bses bsrd bssd bsse bubb bube bubs bubu budb budd bude buds budu buer bueu buke bukk buku bur- burb burd bure burk burr burs buru buse busk buss busu buus dbrs dbss dbus dddd ddes ddre ddss ddub debe debs debu dedd dede dedu deeb deed deek deer dees dek- deke deks der- derb dere derk derr ders des- dese desk dess desu deue deuk deur deus dred dree drek dres drrs drub drue druk drus druu dsdr dsrr dub- dubb dube dubs dubu dudd dude duds dudu duer dues duke duku dure durk duru duse dusk duur ebbr ebbs ebed eber ebes ebru ebur ebus edde edds ede- eder edes edru edss edur eede eedu eeee eees eeke eeks eers eese eesk ekeb eked ekek eker ekes ekur erbb erbe erde erds ereb ered erer eres erke erks erre errs erse erub erur erus esbs esds esdu esee esek eser eses eske esks esku esrd esse essu esus eude euer eur- eure euse kbbb kbbd kbbe kbbk kbbr kbbs kbbu kbdb kbde kbdr kbds kbeb kbed kbee kbek kber kbes kbkb kbkk kbkr kbrb kbrd kbre kbrk kbru kbsb kbsk kbsr kbss kbsu kbub kbud kbue kbuk kbur kbus kbuu kdbb kdbr kdbs kddb kddd kddk kddr kdeb kdkb kdkd kdkk kdkr kdrb kdrs kdsd kdsk kdsr kdss kdsu kdub kdur kdus kebb kebe kebr kebu kedb kedd kede kedr keds keed keek keer kees kekb keke keks keku ker- kerb kere kerk kerr kers keru kesb kesd kesk kesr kess keur keus kkbb kkbd kkbe kkbr kkbs kkdd kked kkkk kkrb kkre kkrk kkrr kkrs kksd kkse kksr kkss kksu kkus kkuu krbb krbd krbe krbk krbr krdd krde krdr krds krdu kreb kred kree krek kres kreu krkd krke krkk krkr krks krku krrb krre krrk krrr krrs krsd krse krsk krsr krss krsu krue kruk krur ksbr ksbs ksdk ksdr ksds ksed ksee ksek kser kskb kskd kske kskk kskr ksks ksku ksrb ksrr ksrs ksse kssr ksss kssu ksub ksud ksue ksuu kubb kubd kube kubr kubs kubu kudd kude kudu kued kuek kues kueu kuke kukk kuks kuku kurb kurd kure kurk kurr kurs kuru kusb kusd kusu kuub kuuk kuur kuuu rbbb rbbr rbbs rbds rbsd rbss rder rebb rebe rebk rebs rebu redd rede redr reds redu reeb reed reek rees reke reks rerd rere rers reru rese ress reue reuk reus reuu rkss rred rrrr rsdd rsds rsee rsre rubb rube rubs rubu rudd rude ruds rued ruer rues ruke rukk ruku rurd rure rurs ruru ruse rusk russ rusu ruud sbbs sbds sber sbrk sbsd sbse sbus sdds sder sdes sdrs sdss sdsu se-d se-e se-k se-s se-u sebe sebs sede seds seeb seed seek seer sees seeu seke sekk seku serb serd sere serk serr sers seru sese sess seur sked skee sker skes sksd skss skud skue skur srde sreb sres srsd srub ssbr ssdd ssee sses ssrs sssb ssss sub- subb subd subs sudd sude suds sued suee suer sues sueu suke suks suku sur- surd sure surr surs suru sus- susd suse susk suss susu suus ubbe ubek uber ubud udds uder udsd uduk uers uess ukek ukes ukeu ukur urbe urbs urde urds urdu ure- ured ures urke urre urse urss ursu uruk urur urus us-k usbe usbr usbs usde usds used usee user uses uske ussb usse ussr usss ussu usus uuuu

b-e-d b-r-k bbbee bbser bbuss bd-re bdser bdubs be-er bebed bebek beber bebes bedde bedee beder bedes bedse bedub bedue beduk beebe beebs beede beeke beerd beers beesd beker bekes bekke berbe berde berdu bered berek beres berk- berke berks berre berru berse berus besed besee besse beuer beure