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