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