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