cletn lcetn celtn ecltn lectn elctn clten lcten ctlen tclen ltcen tlcen cetln ectln cteln tceln etcln tecln letcn eltcn ltecn tlecn etlcn telcn clent lcent celnt eclnt lecnt elcnt clnet lcnet cnlet nclet lncet nlcet cenlt ecnlt cnelt ncelt enclt neclt lenct elnct lnect nlect enlct nelct cltne lctne ctlne tclne ltcne tlcne clnte lcnte cnlte nclte lncte nlcte ctnle tcnle cntle nctle tncle ntcle ltnce tlnce lntce nltce tnlce ntlce cetnl ectnl ctenl tcenl etcnl tecnl centl ecntl cnetl ncetl enctl nectl ctnel tcnel cntel nctel tncel ntcel etncl tencl entcl netcl tnecl ntecl letnc eltnc ltenc tlenc etlnc telnc lentc elntc lnetc nletc enltc neltc ltnec tlnec lntec nltec tnlec ntlec etnlc tenlc entlc netlc tnelc ntelc
Note: these 'words' (valid or invalid) are all the permutations of the word cletn. These words are obtained by scrambling the letters in cletn.