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