class Normalizer:
    def __init__(self):
        self.rules = {
            "orange sweater": "orange_turtleneck",
            "orange pullover": "orange_turtleneck",
            "pink hair": "pink_quills"
        }
    def normalize(self, tag: str) -> str:
        return self.rules.get(tag.lower(), tag.lower().replace(" ", "_"))