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