frust ftmts ftrtt fu-fu fuffs furrs furst furus fusts fusus futsu futur mmmmm mt-tf mt-tm mt-tr mt-tt mtfmt muffs mummu murru murum murus murut musts mustu mutsu mutts mutum mutus rmutt rsssf rsust rtrfm ruffs rufus rummu rumst rus-m rusts rustu ruutu smurf smurr smuss smuts sssss stmfr strrs strsm strum strut stuff stuft stumm stums sturm sturt stuss suffr suffs suftu sumru sumur sumut surfs surtr surur surus susus suttu sutum truff truss trust truus tsmmr tsuru tsuur ttttt tuffs tufts tumut turfs turms turss turst tursu turtu turut tutus tuuru ursus urums urutu usmtf ustum ustur usutu utfsf utrum uttur uturu uuuuu