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