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