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