import re


def remove_numeric_digits(text: str) -> str:
    """Remove numeric characters using regex
    
    Parameters
    ----------
    text : string
        A string containing numeric digits

    Returns
    -------
    string
        A string analogous to the input, but without numeric digits,
        removed using regex
    """
    clean_text = re.sub(r'[0-9]+', " ", text.lower())
    return " ".join(clean_text.split())