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