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