rchat crhat rhcat hrcat chrat hcrat rcaht craht racht archt carht acrht rhact hract rahct arhct harct ahrct chart hcart cahrt achrt hacrt ahcrt rchta crhta rhcta hrcta chrta hcrta rctha crtha rtcha trcha ctrha tcrha rhtca hrtca rthca trhca htrca thrca chtra hctra cthra tchra htcra thcra rcath crath racth arcth carth acrth rctah crtah rtcah trcah ctrah tcrah ratch artch rtach trach atrch tarch catrh actrh ctarh tcarh atcrh tacrh rhatc hratc rahtc arhtc hartc ahrtc rhtac hrtac rthac trhac htrac thrac rathc arthc rtahc trahc atrhc tarhc hatrc ahtrc htarc tharc athrc tahrc chatr hcatr cahtr achtr hactr ahctr chtar hctar cthar tchar htcar thcar cathr acthr ctahr tcahr atchr tachr hatcr ahtcr htacr thacr athcr tahcr
Note: these 'words' (valid or invalid) are all the permutations of the word rchat. These words are obtained by scrambling the letters in rchat.