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