grouu rgouu goruu ogruu roguu orguu gruou rguou gurou ugrou rugou urgou gouru oguru guoru ugoru ougru uogru rougu orugu ruogu urogu ourgu uorgu grouu rgouu goruu ogruu roguu orguu gruou rguou gurou ugrou rugou urgou gouru oguru guoru ugoru ougru uogru rougu orugu ruogu urogu ourgu uorgu gruuo rguuo guruo ugruo ruguo urguo gruuo rguuo guruo ugruo ruguo urguo guuro uguro guuro uguro uugro uugro ruugo urugo ruugo urugo uurgo uurgo gouur oguur guour ugour ougur uogur gouur oguur guour ugour ougur uogur guuor uguor guuor uguor uugor uugor ouugr uougr ouugr uougr uuogr uuogr rouug oruug ruoug uroug ourug uorug rouug oruug ruoug uroug ourug uorug ruuog uruog ruuog uruog uurog uurog ouurg uourg ouurg uourg uuorg uuorg
Note: these 'words' (valid or invalid) are all the permutations of the word grouu. These words are obtained by scrambling the letters in grouu.