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