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