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