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