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