from typing import List


def _make_columns(row_string: str) -> List[str]:
    """
    Provided with input string of single table row,
    return a formated values for that row.
    :param row_string: string that represent one row for
        input table
    :return: list of formated values in the table row
    """
    row_values = filter(lambda s: s.strip() != '', row_string.split('|'))
    return list(map(lambda s: s.strip().lower(), row_values))