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