The Third Mind (Burroughs/Gysin, 1978)

''Works thank you for your collaboration, but they can also create themselves on their own; thus: 
Come to free the words 
To free the words come 
Free the words to come 
The words come to free 
Words come to free thee!
The possible permutations are 5x4x3x2x1= 120 lines. 
Therefore a 120-line poem without an author.''

https://ia700600.us.archive.org/14/items/W.s.Burroughs-PdfCollection/WilliamSBurroughsBrionGysin-3rdMind.pdf