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