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