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