hrccu rhccu hcrcu chrcu rchcu crhcu hrccu rhccu hcrcu chrcu rchcu crhcu hccru chcru hccru chcru cchru cchru rcchu crchu rcchu crchu ccrhu ccrhu hrcuc rhcuc hcruc chruc rchuc crhuc hrucc rhucc hurcc uhrcc ruhcc urhcc hcurc churc hucrc uhcrc cuhrc uchrc rcuhc cruhc ruchc urchc curhc ucrhc hrcuc rhcuc hcruc chruc rchuc crhuc hrucc rhucc hurcc uhrcc ruhcc urhcc hcurc churc hucrc uhcrc cuhrc uchrc rcuhc cruhc ruchc urchc curhc ucrhc hccur chcur hccur chcur cchur cchur hcucr chucr huccr uhccr cuhcr uchcr hcucr chucr huccr uhccr cuhcr uchcr ccuhr ccuhr cuchr ucchr cuchr ucchr rccuh crcuh rccuh crcuh ccruh ccruh rcuch cruch rucch urcch curch ucrch rcuch cruch rucch urcch curch ucrch ccurh ccurh cucrh uccrh cucrh uccrh
Note: these 'words' (valid or invalid) are all the permutations of the word hrccu. These words are obtained by scrambling the letters in hrccu.