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