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