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