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