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