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