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