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