yobby oybby yboby byoby obyby boyby yobby oybby yboby byoby obyby boyby ybboy byboy ybboy byboy bbyoy bbyoy obbyy bobyy obbyy bobyy bboyy bboyy yobyb oybyb yboyb byoyb obyyb boyyb yoybb oyybb yyobb yyobb oyybb yoybb ybyob byyob yybob yybob byyob ybyob obyyb boyyb oybyb yobyb byoyb yboyb yobyb oybyb yboyb byoyb obyyb boyyb yoybb oyybb yyobb yyobb oyybb yoybb ybyob byyob yybob yybob byyob ybyob obyyb boyyb oybyb yobyb byoyb yboyb ybbyo bybyo ybbyo bybyo bbyyo bbyyo ybybo byybo yybbo yybbo byybo ybybo ybybo byybo yybbo yybbo byybo ybybo bbyyo bbyyo bybyo ybbyo bybyo ybbyo obbyy bobyy obbyy bobyy bboyy bboyy obyby boyby oybby yobby byoby yboby obyby boyby oybby yobby byoby yboby bbyoy bbyoy byboy ybboy byboy ybboy
Note: these 'words' (valid or invalid) are all the permutations of the word yobby. These words are obtained by scrambling the letters in yobby.