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