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