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bbbb brrm brrr brum brut btrt bttb bubb bubu bum- bumb bur- burb burm burr burt buru but- butt mmmm mrbb mrbm mrtm mrtt mtrr mttr mumm mumu murr murt muru mutt mutu muut rbbb rbbr rmtu rrrr rrum rubb rubu rumb rumm rumt ruru rutt rutu tbrb tmbr tmtt trmb trmu trtr trub trut truu ttbb tttt tubb tubr tubu tumb tumu turb turm turr turt turu tutt tutu tuum umb- umut urum urur urut utmb uttu uuuu

brmmm brrrr brumm btr-t bumbu burru burtt burut butut mburu mmmmm mt-tm mt-tr mt-tt mummu murru murum murut mutum rmutt rummu ruutu tbtbt tbutt trubu ttttt tumbu tumut turbt turtu turut tuuru urubu urutu utrum uttur uturu uuuuu

bbbbbb brubru brutum bububu burbur burutu murmur muttur mutuum muumuu rubrum rubutu rumbur rurutu tumtum turmut turrum turtur tururu tuttut

bbbbbbb burtrum muu-muu rum-tum tum-tum tut-tut

bbbbbbbb buruburu mbumburu murumuru

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