theic hteic tehic ethic hetic ehtic thiec htiec tihec ithec hitec ihtec teihc etihc tiehc itehc eithc iethc heitc ehitc hietc ihetc eihtc iehtc theci hteci tehci ethci hetci ehtci thcei htcei tchei cthei hctei chtei techi etchi tcehi ctehi ecthi cethi hecti ehcti hceti cheti echti cehti thice htice tihce ithce hitce ihtce thcie htcie tchie cthie hctie chtie tiche itche tcihe ctihe icthe cithe hicte ihcte hcite chite ichte cihte teich etich tiech itech eitch ietch tecih etcih tceih cteih ectih cetih ticeh itceh tcieh ctieh icteh citeh eicth iecth ecith ceith iceth cieth heict ehict hiect ihect eihct iehct hecit ehcit hceit cheit echit cehit hicet ihcet hciet chiet ichet cihet eicht iecht eciht ceiht iceht cieht
Note: these 'words' (valid or invalid) are all the permutations of the word theic. These words are obtained by scrambling the letters in theic.