bbsrc bbuss bcbst bmcsr bmrst brmmm brrrr brumm bruss brust btr-t btstu bttms bucsu bucum bucur bumbu burbs burcu burrs burru burst burts burtt buruc burus burut bussu busts busum busur busut busuu butts butut c-bus ccccc cmbst crumb crums crust cruts cstcc ctcum ctrsm cubub cumbu cumm- curbs currs curst curts cusum cutcu cutts mbccs mburu mcbbs mmccc mmmcc mmmmm mrcub mt-tc mt-tm mt-tr mt-tt muctc mucum mucur mucus mumcu mummu murru murum murus murut musc- musts mustu mutsu mutts mutum mutus rmutt rsust rubus rummu rumst rus-m rusts rustu ruutu s-bus sccbc scrms scrub scrum scrus sctrs scum- scumm scums scurr scurt scut- scuts scutt smbus smurr smuss smuts sssrb sssss stcum strrs strsm strub struc strum strut stubs stumm stums sturb sturm sturt stuss subbu subss subst sucr- sucst sumru sumur sumut surtr surur surus susus suttu sutum tbtbt tbutt trubs trubu truss trust truus tsmmr tsrcs tsuru tsuur ttttt ttusb tubbs tuctu tucum tumbu tumut turbt turms turss turst tursu turtu turut tutus tuuru ursus urubu urucu urums urutu us-sc usmcr ustum ustur usutu utrum uttur uturu uuuuu