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