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