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