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