-hou bbbb bbpr bhor bhuj bhur bhuu bobb bobo bobu boho bohr bohu bojo boju boob booh boop boor bopp bor- borh borj boro borr boru bouh boup bour brob broh broo bror brou brrr bruh brup bubb bubo bubu buho buhr bujo buju bur- burb burh burj buro burp burr buru hhhh hobo hoho hojo hoju hoop hoor hopo hopp horo horr houp hour hrob hrpp hubb hubo huhu huor hupp huro hurr huru huub j-ro jbob jobo jobu joho jojo joor joro joup jour jpop jrbr jruh jubu juho juhu juju jupp jupu jurr obbo obor obrh obro obuh ohho ohob ohoh ooho oooh oooo opo- opoj opor oppo orbb orbo orbu oro- oror orph orro orub oruj orup ouju ouph our- ouro ouu- phob phoh phoo phrr pobo pojo pooh poop poor pop- popo popp porb poro porr poup pour pppo pppp ppru ppur pro- prob proj proo prop prou pruu pubu pujo puju pupu pur- purb puro purp purr puru rbbb rbbr rboh rbpj rhob rhoh rhoj rob- robb robo robu rohr rohu rojo roob roop roor ropo roro roru roub rouh roup rpho rpob rrrr rubb rubp rubu ruhh ruhr rupp ruro rurp ruru u-rp ubbo uhoh uhuh uhup ujpo uor- upor uppp uppu upup urho uro- uroo urpo urrh urup urur uuuu