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