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