larch alrch lrach rlach arlch ralch lacrh alcrh lcarh clarh aclrh calrh lrcah rlcah lcrah clrah rclah crlah arclh raclh acrlh carlh rcalh cralh larhc alrhc lrahc rlahc arlhc ralhc lahrc alhrc lharc hlarc ahlrc halrc lrhac rlhac lhrac hlrac rhlac hrlac arhlc rahlc ahrlc harlc rhalc hralc lachr alchr lcahr clahr aclhr calhr lahcr alhcr lhacr hlacr ahlcr halcr lchar clhar lhcar hlcar chlar hclar achlr cahlr ahclr haclr chalr hcalr lrcha rlcha lcrha clrha rclha crlha lrhca rlhca lhrca hlrca rhlca hrlca lchra clhra lhcra hlcra chlra hclra rchla crhla rhcla hrcla chrla hcrla archl rachl acrhl carhl rcahl crahl arhcl rahcl ahrcl harcl rhacl hracl achrl cahrl ahcrl hacrl charl hcarl rchal crhal rhcal hrcal chral hcral
Note: these 'words' (valid or invalid) are all the permutations of the word larch. These words are obtained by scrambling the letters in larch.