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