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