drunk rdunk durnk udrnk rudnk urdnk drnuk rdnuk dnruk ndruk rnduk nrduk dunrk udnrk dnurk ndurk undrk nudrk rundk urndk rnudk nrudk unrdk nurdk drukn rdukn durkn udrkn rudkn urdkn drkun rdkun dkrun kdrun rkdun krdun dukrn udkrn dkurn kdurn ukdrn kudrn rukdn urkdn rkudn krudn ukrdn kurdn drnku rdnku dnrku ndrku rndku nrdku drknu rdknu dkrnu kdrnu rkdnu krdnu dnkru ndkru dknru kdnru nkdru kndru rnkdu nrkdu rkndu krndu nkrdu knrdu dunkr udnkr dnukr ndukr undkr nudkr duknr udknr dkunr kdunr ukdnr kudnr dnkur ndkur dknur kdnur nkdur kndur unkdr nukdr ukndr kundr nkudr knudr runkd urnkd rnukd nrukd unrkd nurkd ruknd urknd rkund krund ukrnd kurnd rnkud nrkud rknud krnud nkrud knrud unkrd nukrd uknrd kunrd nkurd knurd
Note: these 'words' (valid or invalid) are all the permutations of the word drunk. These words are obtained by scrambling the letters in drunk.