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