cotts octts ctots tcots otcts tocts cotts octts ctots tcots otcts tocts cttos tctos cttos tctos ttcos ttcos ottcs totcs ottcs totcs ttocs ttocs cotst octst ctost tcost otcst tocst costt ocstt csott scott osctt soctt ctsot tcsot cstot sctot tscot stcot otsct tosct ostct sotct tsoct stoct cotst octst ctost tcost otcst tocst costt ocstt csott scott osctt soctt ctsot tcsot cstot sctot tscot stcot otsct tosct ostct sotct tsoct stoct cttso tctso cttso tctso ttcso ttcso ctsto tcsto cstto sctto tscto stcto ctsto tcsto cstto sctto tscto stcto ttsco ttsco tstco sttco tstco sttco ottsc totsc ottsc totsc ttosc ttosc otstc tostc osttc sottc tsotc stotc otstc tostc osttc sottc tsotc stotc ttsoc ttsoc tstoc sttoc tstoc sttoc
Note: these 'words' (valid or invalid) are all the permutations of the word cotts. These words are obtained by scrambling the letters in cotts.