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