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