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