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