ptcha tpcha pctha cptha tcpha ctpha pthca tphca phtca hptca thpca htpca pchta cphta phcta hpcta chpta hcpta tchpa cthpa thcpa htcpa chtpa hctpa ptcah tpcah pctah cptah tcpah ctpah ptach tpach patch aptch tapch atpch pcath cpath pacth apcth capth acpth tcaph ctaph tacph atcph catph actph pthac tphac phtac hptac thpac htpac ptahc tpahc pathc apthc taphc atphc phatc hpatc pahtc aphtc haptc ahptc thapc htapc tahpc athpc hatpc ahtpc pchat cphat phcat hpcat chpat hcpat pcaht cpaht pacht apcht capht acpht phact hpact pahct aphct hapct ahpct chapt hcapt cahpt achpt hacpt ahcpt tchap cthap thcap htcap chtap hctap tcahp ctahp tachp atchp cathp acthp thacp htacp tahcp athcp hatcp ahtcp chatp hcatp cahtp achtp hactp ahctp
Note: these 'words' (valid or invalid) are all the permutations of the word ptcha. These words are obtained by scrambling the letters in ptcha.