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