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