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