rvli vrli rlvi lrvi vlri lvri rvil vril rivl irvl virl ivrl rliv lriv rilv irlv lirv ilrv vlir lvir vilr ivlr livr ilvr
Note: these 'words' (valid or invalid) are all the permutations of the word rvli. These words are obtained by scrambling the letters in rvli.