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