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