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