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