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