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