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