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