bbbbbbb bohorok bohourt bok-bok boo-boo boo-hoo boobook bootout borotou bothro- boukout bourout bourrou boutoko brokour bukhoor bukhoro buttout hoo-hoo horrour hortour hot-tub hothur hotoku hub-bub hur-bur hutuktu khubkuh kobroor kokorou kor-kor korkoro kothuru kottoor kotturu kuththu kuttoor oktrout oroboro ortho-k otokutu ottrott outboob outbutt outouth outroot rootout rootrot rub-out rubbour rubokht ruh-roh ruhrort thorrur thruout thurrok thuthur tohoku tohorot tokobot too-hoo too-too tookout torbook torhout tortour tototoo touboro toukoro toukoto tro-tro troorkh trotout trubrot tuk-tuk turbott tut-hoo tut-tut ububboo