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