Your goal is to find the secret four-color code. The following colors are possible: blue, brown, purple, black, green, yellow.
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: ['purple', 'yellow', 'blue', 'green']. Hint: two colors are in the correct positions and one color is in the secret code but in the wrong positions.
Guess: ['blue', 'blue', 'brown', 'green']. Hint: two colors are in the secret code but in the wrong positions.
Guess: ['brown', 'yellow', 'purple', 'black']. Hint: three colors are in the secret code but in the wrong positions.
A B C D
green, brown, green, black purple, brown, blue, yellow green, blue, blue, yellow brown, green, blue, green