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