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