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