trial rtial tiral itral rital irtal trail rtail taril atril ratil artil tiarl itarl tairl atirl iatrl aitrl riatl iratl raitl aritl iartl airtl trila rtila tirla itrla ritla irtla trlia rtlia tlria ltria rltia lrtia tilra itlra tlira ltira iltra litra rilta irlta rlita lrita ilrta lirta trali rtali tarli atrli ratli artli trlai rtlai tlrai ltrai rltai lrtai talri atlri tlari ltari altri latri ralti arlti rlati lrati alrti larti tialr italr tailr atilr iatlr aitlr tilar itlar tliar ltiar iltar litar talir atlir tlair ltair altir latir ialtr ailtr ilatr liatr alitr laitr rialt iralt railt arilt iarlt airlt rilat irlat rliat lriat ilrat lirat ralit arlit rlait lrait alrit larit ialrt ailrt ilart liart alirt lairt
Note: these 'words' (valid or invalid) are all the permutations of the word trial. These words are obtained by scrambling the letters in trial.