tocos otcos tcoos ctoos octos cotos toocs otocs toocs otocs ootcs ootcs tcoos ctoos tocos otcos cotos octos ocots coots oocts oocts coots ocots tocso otcso tcoso ctoso octso cotso tosco otsco tsoco stoco ostco sotco tcsoo ctsoo tscoo stcoo cstoo sctoo ocsto costo oscto socto csoto scoto toosc otosc toosc otosc ootsc ootsc tosoc otsoc tsooc stooc ostoc sotoc tosoc otsoc tsooc stooc ostoc sotoc oostc oostc osotc sootc osotc sootc tcoso ctoso tocso otcso cotso octso tcsoo ctsoo tscoo stcoo cstoo sctoo tosco otsco tsoco stoco ostco sotco costo ocsto csoto scoto oscto socto ocost coost oocst oocst coost ocost ocsot cosot oscot socot csoot scoot oosct oosct osoct sooct osoct sooct cosot ocsot csoot scoot oscot socot
Note: these 'words' (valid or invalid) are all the permutations of the word tocos. These words are obtained by scrambling the letters in tocos.