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