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