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