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