incog nicog icnog cinog nciog cniog inocg niocg ioncg oincg noicg onicg icong ciong iocng oicng coing ocing ncoig cnoig nocig oncig conig ocnig incgo nicgo icngo cingo ncigo cnigo ingco nigco ignco ginco ngico gnico icgno cigno igcno gicno cgino gcino ncgio cngio ngcio gncio cgnio gcnio inogc niogc iongc oingc noigc onigc ingoc nigoc ignoc ginoc ngioc gnioc iognc oignc igonc gionc oginc goinc nogic ongic ngoic gnoic ognic gonic icogn ciogn iocgn oicgn coign ocign icgon cigon igcon gicon cgion gcion iogcn oigcn igocn giocn ogicn goicn cogin ocgin cgoin gcoin ogcin gocin ncogi cnogi nocgi oncgi congi ocngi ncgoi cngoi ngcoi gncoi cgnoi gcnoi nogci ongci ngoci gnoci ognci gonci cogni ocgni cgoni gconi ogcni gocni
Note: these 'words' (valid or invalid) are all the permutations of the word incog. These words are obtained by scrambling the letters in incog.