bhour bo-bo bo-ho boboc bobr bocho bocor bohor booch booco booru borbo borch boro- boroo borou borro bouch brobo broch brrrr bruch bucco bucho buchu bucur buoch buoho burch burcu buroo burro burru buruc c-cor ccccc choco choor chor- choro chubb chur- churr churu co-bo co-co cocc- cocco cocur cohob cohoo cooch corbo corbu coro- couch couco courb couru croco cruor cubo- cubub cuoco curch curro h-cho hcooh hhhhh hhour ho-ho ho-oh hobor hobro hobub hocco hooch horch horro horru houch hourc hroch hubur hucch hucho huhuh huuru o-r-b obhor oboro occur ochro ocr-b oh-oh ohchr ohour ohrob ooooh ooooo orobo oroch oroco oruch oruro oucho ouoro r-co- ro-ro robbo robo- robor robur rocco rocor rocou rohob rohru rorbu rouch rubor ruhub ubobo uchuu uh-oh uh-uh uhhoh uhhuh uhuru uroob urour urubu urucu uuuuu