chast hcast cahst achst hacst ahcst chsat hcsat cshat schat hscat shcat casht acsht csaht scaht ascht sacht hasct ahsct hsact shact ashct sahct chats hcats cahts achts hacts ahcts chtas hctas cthas tchas htcas thcas caths acths ctahs tcahs atchs tachs hatcs ahtcs htacs thacs athcs tahcs chsta hcsta cshta schta hscta shcta chtsa hctsa cthsa tchsa htcsa thcsa cstha sctha ctsha tcsha stcha tscha hstca shtca htsca thsca sthca tshca casth acsth csath scath ascth sacth catsh actsh ctash tcash atcsh tacsh cstah sctah ctsah tcsah stcah tscah astch satch atsch tasch stach tsach hastc ahstc hsatc shatc ashtc sahtc hatsc ahtsc htasc thasc athsc tahsc hstac shtac htsac thsac sthac tshac asthc sathc atshc tashc stahc tsahc
Note: these 'words' (valid or invalid) are all the permutations of the word chast. These words are obtained by scrambling the letters in chast.