rugal urgal rgual grual ugral gural ruagl uragl raugl arugl uargl aurgl rgaul graul ragul argul garul agrul ugarl guarl uagrl augrl gaurl agurl rugla urgla rgula grula ugrla gurla rulga urlga rluga lruga ulrga lurga rglua grlua rlgua lrgua glrua lgrua uglra gulra ulgra lugra glura lgura rualg uralg raulg arulg uarlg aurlg rulag urlag rluag lruag ulrag lurag ralug arlug rlaug lraug alrug larug ualrg aulrg ularg luarg alurg laurg rgalu gralu raglu arglu garlu agrlu rglau grlau rlgau lrgau glrau lgrau ralgu arlgu rlagu lragu alrgu largu galru aglru glaru lgaru algru lagru ugalr gualr uaglr auglr gaulr agulr uglar gular ulgar lugar gluar lguar ualgr aulgr ulagr luagr alugr laugr galur aglur glaur lgaur algur lagur
Note: these 'words' (valid or invalid) are all the permutations of the word rugal. These words are obtained by scrambling the letters in rugal.