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