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