yucca uycca ycuca cyuca ucyca cuyca yucca uycca ycuca cyuca ucyca cuyca yccua cycua yccua cycua ccyua ccyua uccya cucya uccya cucya ccuya ccuya yucac uycac ycuac cyuac ucyac cuyac yuacc uyacc yaucc ayucc uaycc auycc ycauc cyauc yacuc aycuc cayuc acyuc ucayc cuayc uacyc aucyc cauyc acuyc yucac uycac ycuac cyuac ucyac cuyac yuacc uyacc yaucc ayucc uaycc auycc ycauc cyauc yacuc aycuc cayuc acyuc ucayc cuayc uacyc aucyc cauyc acuyc yccau cycau yccau cycau ccyau ccyau ycacu cyacu yaccu ayccu caycu acycu ycacu cyacu yaccu ayccu caycu acycu ccayu ccayu cacyu accyu cacyu accyu uccay cucay uccay cucay ccuay ccuay ucacy cuacy uaccy auccy caucy acucy ucacy cuacy uaccy auccy caucy acucy ccauy ccauy cacuy accuy cacuy accuy
Note: these 'words' (valid or invalid) are all the permutations of the word yucca. These words are obtained by scrambling the letters in yucca.