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