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