def regDistr(data):
    """Make list of columns name for creating region cases destribution

    Args:
        data (pandas DataFrame): main data

    Returns:
        list of strings: list of columns name
    """
    _cols = [col for col in data.columns if 'округ' in col]
    _cols.append('дата')
    _cols.append('Калининград')
    return _cols