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