clean lcean celan eclan lecan elcan claen lcaen calen aclen lacen alcen cealn ecaln caeln aceln eacln aecln leacn elacn laecn alecn ealcn aelcn clena lcena celna eclna lecna elcna clnea lcnea cnlea nclea lncea nlcea cenla ecnla cnela ncela encla necla lenca elnca lneca nleca enlca nelca clane lcane calne aclne lacne alcne clnae lcnae cnlae nclae lncae nlcae canle acnle cnale ncale ancle nacle lance alnce lnace nlace anlce nalce ceanl ecanl caenl acenl eacnl aecnl cenal ecnal cneal nceal encal necal canel acnel cnael ncael ancel nacel eancl aencl enacl neacl anecl naecl leanc elanc laenc alenc ealnc aelnc lenac elnac lneac nleac enlac nelac lanec alnec lnaec nlaec anlec nalec eanlc aenlc enalc nealc anelc naelc
Note: these 'words' (valid or invalid) are all the permutations of the word clean. These words are obtained by scrambling the letters in clean.