yabba aybba ybaba byaba abyba bayba yabba aybba ybaba byaba abyba bayba ybbaa bybaa ybbaa bybaa bbyaa bbyaa abbya babya abbya babya bbaya bbaya yabab aybab ybaab byaab abyab bayab yaabb ayabb yaabb ayabb aaybb aaybb ybaab byaab yabab aybab bayab abyab abayb baayb aabyb aabyb baayb abayb yabab aybab ybaab byaab abyab bayab yaabb ayabb yaabb ayabb aaybb aaybb ybaab byaab yabab aybab bayab abyab abayb baayb aabyb aabyb baayb abayb ybbaa bybaa ybbaa bybaa bbyaa bbyaa ybaba byaba yabba aybba bayba abyba ybaba byaba yabba aybba bayba abyba bbaya bbaya babya abbya babya abbya abbay babay abbay babay bbaay bbaay ababy baaby aabby aabby baaby ababy ababy baaby aabby aabby baaby ababy bbaay bbaay babay abbay babay abbay
Note: these 'words' (valid or invalid) are all the permutations of the word yabba. These words are obtained by scrambling the letters in yabba.