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