def collection_id(product: str, version: str) -> str:
    """Creates a collection id from a product and a version:

    Args:
        product (str): The MODIS product
        version (str): The MODIS version

    Returns:
        str: The collection id, e.g. "modis-MCD12Q1-006"
    """
    return f"modis-{product}-{version}"