from typing import Union
from typing import Counter


def most_common_items(content: Union[str, list, tuple]):
    """Finds the top three most commonly given values.

    Parameters
    ----------
    content : Union[str, list, tuple]
        The `content` is composed of the items/values.

    Returns
    -------
    common_elements : list
        Returns a list containing the three most common values.
    """
    common_elements = Counter(content).most_common(3)

    return common_elements