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