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