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