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