instruction: Your goal is to find the secret two-color code. The following colors are possible: yellow, purple, green, blue.
  Some guesses have already been made. I will provide feedback for each guess made with which it is possible to unambigiously determine the secret code.
  
  Previous Guesses:
  Guess: ['yellow', 'blue']. Hint: none of the guessed colors are present in the secret code.
  Guess: ['purple', 'purple']. Hint: one color is in the correct position.
  Guess: ['purple', 'green']. Hint: two colors are in the secret code but in the wrong positions.