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foofoo foofur foorum formo- foufou fourof fourou furfur furour furrfu moffom moffou mommur moomoo mormor mormur mourou muffro murmur muumuu oooooo oromoo orrour romour rumour u-form urform

foo-foo fou-fou fourmor furrour moo-moo morrum moumour muu-muu off-off offform roomfor ur-form

froufrou murumuru off-form

four-four frou-frou oromoromo

rumorrumor

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