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