kukok kukur kurbu kurch kurku kuruc kuruk o-r-b obhor obock oboro obrok occur ochro ockro ocr-b oh-oh oh-ok ohchr ohour ohrob okcho okkur okobo okoc okoho okoro okubo okuku okuru ooooh ooooo orobo oroch oroco oruch oruku oruro oucho ouoro r-co- ro-ro robbo robo- robor robur rocco rocko rocor rocou rohob rohru rokkk rookh rorbu rouch rouko rubor ruhub ubobo uchku uchuu uh-oh uh-uh uhhoh uhhuh uhuru ukobu uroob urour urubu urucu uuork uuuuu

bbbbbb bhookh bhurch bo-hoo bobrok boccob bochco bochor bochur bocock bokoro booboo boohoo borbor borkou boroko bororo boruch boubou boukou bourou brocco brocho brocor brokkr brooch broock brouch brouck brubru bububu bucco- buchch bukkur bukuru burbur burhou buruku chocho chooch chorku choro- chorro chorur chucho chuchu chukku chukor chukur chuo church churro churuk cobbob cocco- cococo coocoo cookoo corour coruco coruro courbu courr- crocco crochu crooch crouch cruro- cuckoo cucurb curour curror cururo h-hour hkcccc hocooh hocour hohoho hoohoo hookor hooroo hororo horror hubbub hububb huh-uh hukkok hurroo k-rock khocho khoroo khoruk khuhro koboko kohoku kokkoh kokoku kokoro kokubo kookoo korkor kororo korubo koruru koubou koukou kouoro kourou kukoc kurkcu kuroch kuroko kurukh kururu o-hook occour ocho ochro- ohohoh oohooh ookroo oooooo orrho- orrock orrour rochor rococo rokkor rokuko rokuro roucou rubro- ruhroh ruocco uh-huh urhobo

bbbbbbb bohorok bok-bok boo-boo boo-hoo boobook boocock bourock bourrou brokour bukhoor bukhoro burrock chocobo choho chorbok chorkor choruru choucho chuchur chukchu chukuru churchk churchu chururu cochour cooccur corrour cou-cou cubukcu cuchuco currock hoo-hoo horrour hub-bub hur-bur hurrock khubkuh kobroor kochkor kocho kokocko kokorou kor-kor korkoro korucuk kucbork oroboro rococco rubbour ruh-roh ububboo uchuruk

bbbbbbbb bo-bo-bo broubrou buckbuck buruburu chokocho choochoo choroku chouchou chu-chou chubbuck chuckoor co-occur cocoroco cookbook corocoro cro-hook cucurucu curucucu hococooh hokohoko horbruch horohoro hubbuboo hurr-bur kobukuro kohukohu kokborok kukukuku kukuruku kuruburu kurukuru ockbrook ohboohoo rokkurro rubrouck ubbubboo uh-uh-uh

borborbor choo-choo chorrocho chuo-ku couroucou cucurucho hurr-burr koukourou rockbrook rockchuck roocoocoo

kouroukoro kukkurukuu rococococo

church-book hookorcrook

hocochchcooh ooohooohoooh

bbbbbbbbbbbbbbb ccccccccccccccc

hhhhhhhhhhhhhhhhhhhhh

hohohohohohohohohohohohohohohohohohohohoho