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