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