tacts atcts tcats ctats actts catts tatcs attcs ttacs ttacs attcs tatcs tctas cttas ttcas ttcas cttas tctas actts catts atcts tacts ctats tcats tacst atcst tcast ctast actst catst tasct atsct tsact stact astct satct tcsat ctsat tscat stcat cstat sctat acstt castt asctt sactt csatt scatt tatsc attsc ttasc ttasc attsc tatsc tastc atstc tsatc statc asttc sattc ttsac ttsac tstac sttac tstac sttac atstc tastc asttc sattc tsatc statc tctsa cttsa ttcsa ttcsa cttsa tctsa tcsta ctsta tscta stcta cstta sctta ttsca ttsca tstca sttca tstca sttca ctsta tcsta cstta sctta tscta stcta actst catst atcst tacst ctast tcast acstt castt asctt sactt csatt scatt atsct tasct astct satct tsact stact ctsat tcsat cstat sctat tscat stcat
Note: these 'words' (valid or invalid) are all the permutations of the word tacts. These words are obtained by scrambling the letters in tacts.