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