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