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