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