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