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