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