eatcu aetcu etacu teacu atecu taecu eactu aectu ecatu ceatu acetu caetu etcau tecau ectau cetau tceau cteau atceu taceu acteu cateu tcaeu ctaeu eatuc aetuc etauc teauc ateuc taeuc eautc aeutc euatc ueatc auetc uaetc etuac teuac eutac uetac tueac uteac atuec tauec autec uatec tuaec utaec eacut aecut ecaut ceaut aceut caeut eauct aeuct euact ueact auect uaect ecuat ceuat eucat uecat cueat uceat acuet cauet aucet uacet cuaet ucaet etcua tecua ectua cetua tceua cteua etuca teuca eutca uetca tueca uteca ecuta ceuta eucta uecta cueta uceta tcuea ctuea tucea utcea cutea uctea atcue tacue actue catue tcaue ctaue atuce tauce autce uatce tuace utace acute caute aucte uacte cuate ucate tcuae ctuae tucae utcae cutae uctae
Note: these 'words' (valid or invalid) are all the permutations of the word eatcu. These words are obtained by scrambling the letters in eatcu.