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