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