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-hou bbbb bbpr bbrg bhir bhog bhoi bhor bhur bhuu bibb bibi bibo bigb bigg bigo bigu bihi bihu bio- biog bioi biou bipp bipu birb birg biri biro birr biru bobb bobi bobo bobu bogg bogh bogi bogo boho bohr bohu boi- boii boiu boob boog booh boop boor bopp bor- borg borh bori boro borr boru bouh boup bour brig brih brio brob brog broh broo bror brou brrr brug bruh brup bubb bubi bubo bubu bugg bugh bugi bugo buhi buho buhr buir buiu bur- burb burg burh buri buro burp burr buru gbbo gggg gghg ggpo ghib ghoi ghug gibb gibh gigg gigi gigo giog gioi giop gipi gipp girg giri giro girr giru giur gobi gobo gogh gogi gogo gohb goip goog gooi goop goor gopi gopo gopu gorb gorg gori goro gorp gorr gou- goug goup gour gpgp gpip gprp grbr grib grig grip grob grog groh groi groo grop gror grou grrr grub grug grui grur gubb gubi gubu gugb gugg gugh gugi gugu guhr guib gurb gurg gurh guri guro gurr guru h-ii hbio hhgg hhhh hhip hibi hibu high higi hihi hiho hiiu hiob hipo hipp hiri hiro hiru hobo hogg hogh hogi hogo hogu hoho hoip hoir hoop hoor hopi hopo hopp horg hori horo horr houp hour hpgp hrib hrip hrob hrpp hubb hubi hubo hugg hugh hugi hugo huhi huhu huib huir huor hupp huri huro hurr huru huub i-go ibri ibro igbo igoo igor igri ihob ihop ihub ihug ihuo iiii iiio iioi iioo iiop iobi ioii ioio iooi iooo iorg iori ioug iphr ipoh ipop ippo ippr ipri ipur irbp iri- irig irio irip irob iroh irop irri iuiu iupp obbo oboi obor obrh obri obro obuh ogb oggi oghi ogog ogoi ogou ogpu ogri ogro ogui ohgr ohhi ohho ohio ohob ohoh oigo oiii oobi ooho oooh oooo ophi opii opio opo- opor oppi oppo orbb orbi orbo orbu orgo ori- orig orio oro- oror orph orpi orri orro orub orup ough ouii ouir ouph our- ouro ouu- pgib pgou pgpu pgup phi- phip phob phog phoh phoo phrr pibb pibi pigb pigg pigh pigo pigp pigu piip piob pipi pipo pipp pirg piri piro pirr piru pobo pogg pogh pogo poio pooh poop poor pop- popi popo popp porb porg pori poro porr poui poup pour ppgi pphi ppib ppig ppih pppo pppp ppru ppur pri- prig prii pro- prob prog proo prop prou prri pruu pubu pugh pugo pugu puhi puig puir puiu pupi pupu pur- purb purg puri puro purp purr puru rbbb rbbr rbgh rboh rgbi rhbg rhib rhio rhob rhog rhoh rhug rib- ribo ribu rigg righ rigi rigo rigu riho riou ripi ripp ripr riri rob- robb robi robo robu rogg rogh rogi rogo rohr rohu roig roio roir roiu roob roog rooi roop roor ropo rori roro roru roub rouh roup rpho rpii rpob rrrr rubb rubi rubp rubu rugg rugh rugi ruhh ruhi ruhr rupp ruri ruro rurp ruru u-rp ubbi ubbo