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