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