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