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