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