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