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