gerbe egrbe grebe rgebe ergbe regbe gebre egbre gbere bgere ebgre begre grbee rgbee gbree bgree rbgee brgee erbge rebge ebrge berge rbege brege gereb egreb greeb rgeeb ergeb regeb geerb egerb geerb egerb eegrb eegrb greeb rgeeb gereb egreb regeb ergeb eregb reegb eergb eergb reegb eregb geber egber gbeer bgeer ebger beger geebr egebr geebr egebr eegbr eegbr gbeer bgeer geber egber beger ebger ebegr beegr eebgr eebgr beegr ebegr grbee rgbee gbree bgree rbgee brgee grebe rgebe gerbe egrbe regbe ergbe gbere bgere gebre egbre begre ebgre rbege brege rebge erbge berge ebrge erbeg rebeg ebreg bereg rbeeg breeg erebg reebg eerbg eerbg reebg erebg eberg beerg eebrg eebrg beerg eberg rbeeg breeg rebeg erbeg bereg ebreg
Note: these 'words' (valid or invalid) are all the permutations of the word gerbe. These words are obtained by scrambling the letters in gerbe.