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