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