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