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