bield ibeld beild ebild iebld eibld biled ibled blied lbied ilbed libed belid eblid bleid lbeid elbid lebid ielbd eilbd ilebd liebd elibd leibd biedl ibedl beidl ebidl iebdl eibdl bidel ibdel bdiel dbiel idbel dibel bedil ebdil bdeil dbeil edbil debil iedbl eidbl idebl diebl edibl deibl bilde iblde blide lbide ilbde libde bidle ibdle bdile dbile idble dible bldie lbdie bdlie dblie ldbie dlbie ildbe lidbe idlbe dilbe ldibe dlibe beldi ebldi bledi lbedi elbdi lebdi bedli ebdli bdeli dbeli edbli debli bldei lbdei bdlei dblei ldbei dlbei eldbi ledbi edlbi delbi ldebi dlebi ieldb eildb iledb liedb elidb leidb iedlb eidlb idelb dielb edilb deilb ildeb lideb idleb dileb ldieb dlieb eldib ledib edlib delib ldeib dleib
Note: these 'words' (valid or invalid) are all the permutations of the word bield. These words are obtained by scrambling the letters in bield.