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