bbbbbb bobrok bogoro bokoro booboo bookup borbor borkou borogo boroko bororo boubou bougou boukou bourou brokkr brorup brubru bububu bugbug buk-gu bukkur bukuru burbur burgoo burgor burrup buruku g-book gob-up gobbur gogoro googoo gooroo gorgor gourou groupo grugru gruppo gubgub gurbru gurugu kobogo koboko kogoro kokoku kokopo kokopu kokoro kokubo kookoo koopoo korkor kororo korubo koruru koubou koukou kouoro kourou krupuk kurogo kuroko kururu obourg okpoko ookroo oooooo oppurg orrour oukoop poboru pogoro pokuru pookoo poopoo pop-up popopo poporo poppop porrog poupko poupou pppppp prokop propup propur purpur purugu puukko robo-g rokkor rokuko rokupr rokuro roogoo rub-up rubro- uppoor upprop uruppu