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