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