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