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