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