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