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