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