bbbbbb bhookh bo-hoo bokkom bokomo bombom booboo boohoo boojum boom-o boubou boukou bububu bumboo h-bomb ho-hum hohoho hoohoo hookum hubbub hububb huh-uh hukkok humhub humhum hummum j-bomb joojoo jouhou jubjub jujo jumboo khumbu koboko kohoku kokkoh kokoku kokomo kokubo kookoo koubou koukou kukuom kum-bu kumbuk kumbum kumkum kummuh kumukh mbombo mbomou mm-hmm mohuhu momoko moojub moomoo mubuko muhuhu muumuu o-hook ohohoh okumoo oohooh oooooo ubombo uh-huh um-hum