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