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