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