b-room bbbbbb bombom bombur booboo boom-o bootup borbor boromo bororo botoro bottom boubou bourou boutob bromo- brorup brotto brubru brutto brutum bububu bumboo bumout bumppo burbot burbur burotu burrup burutu butbro buttto buutuo mbombo mbomou mmmbop mobutu mommur moomoo moopoo moorup mop-up moptop morbut mormor mormur moroto morrot motmot motomu motor- motoro motour moturu mourou mpombo mrmoto murmur muroto mutomo muttur mutuum muumuu obturb ombro- oomoto oooooo oporto optoro optout oromoo oropom orrour otmoor ottoor outour output outrup outtop outtro poboru pombur pompom poopoo pop-up popbot popopo poporo popout poppop poptop porrum portom pottop pottum poupou pppppp probot prompt propup propur proto- prutot pumpup pupput purpur put-up putour putout putput puttoo puttur robomb roboto romour roomto rootup rotour rotout rotrou rottum routot rub-up rubbot rubout rubro- rubrum rubutu rumbur rumour rumpot ruptor rurutu rutour t-room to-put toboot tommot tomort tompot tomtom tomtor tootoo top-up toporu topout toppop tororo torpor tortor tortou tortum tot-up totopo totoro totrot tourou toutou toutuo trombo trompo tropo- troppo trotro troump trumbo tumour tumtum tuotuo turbo- turbot turmut turrum turtur tururu tutour tuttut u-boot ubombo up-put uppoor upprop uproot uruppu utroor