bbbb bbpr bbrg bkpg bkpr bobb bobo bobu bogg bogo boko boku boob boog book boop boor bopp bor- borg bork boro borr boru bouk boup bour brkb brob brog brok broo bror brou brrr brug brup bubb bubo bubu bugg bugo bukk buko buku bur- burb burg burk buro burp burr buru gbbo gggg ggpo gkrp gobo gogo goku goog gook goop goor gopo gopu gorb gorg goro gorp gorr gou- goug gouk goup gour gpgp gprp grbr grob grog grok groo grop gror grou grrr grub grug grur gubb gubu gugb gugg gugu gurb gurg gurk guro gurr guru kbbb kbbg kbbk kbbo kbbr kbbu kbgb kbgg kbgo kbgr kbkb kbkg kbkk kbko kbkr kbob kbok kboo kbpg kbpk kbpo kbpr kbpu kbrb kbrg kbrk kbro kbru kbub kbuk kbup kbur kbuu kgbb kgbr kggg kggo kggr kgor kgou kgpg kgpr kgrb kgrg kgrk kgro kgrr kkbb kkbg kkbo kkbr kkgb kkgo kkgr kkkk kkob kkoo kkor kkpk kkrb kkrk kkro kkrr kkup kkuu kobb kobk kobo kobr kobu kogb kogg kogo kogu kokb kokk koko kokp kokr koku koob koog kook kooo koop koor koou kopb kopp kopr kopu korb korg kork koro korr koru koub kour kouu kpbb kpbg kpbr kpgb kpgg kpgr kpkk kpkr kpob kpok kpoo kpop kpou kppk kppo kppp kppr kprb kprg kprk kpro kprp kprr kpru kpub kpug kpur krbb krbg krbk krbr krkk krko krkr krku krob krog krok kroo krop kror krpr krpu krrb krrg krrk krro krrr krug kruk krup krur kubb kubo kubr kubu kugb kugo kugr kukk kuku kuok kuoo kuop kupb kupr kupu kurb kurk kuro kurr kuru kuub kuuk kuur kuuu obbo obkb obok obor obro ogb ogog ogou ogpu ogro okgo okko okok okor okpo okro okur ooku oooo opkg opo- opor oppo orbb orbo orbu orgo orko oro- orok oror orro orub orup our- ouro ouu- pbpk pgou pgpu pgup pobo pogg pogo poko poku pook poop poor pop- popo popp porb porg pork poro porr pouk poup pour pppo pppp ppru ppur pro- prob prog proo prop prou pruu pubu pugo pugu puku pupu pur- purb purg puro purp purr puru rbbb rbbr rob- robb robo robu rogg rogo rokk roko rokr roku roob roog rook roop roor ropo rork roro roru roub rouk roup rpob rrrr rubb rubp rubu rugg rukk ruku ruok rupp ruro rurp ruru u-rp ubbo uggo ugro ugur uguu ukko ukok ukup ukur uor- upgo upor uppp uppu upup urgu uro- urok uroo urpo uruk urup urur uuuu