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