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