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