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