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