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