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