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