def insert_bn(names:list) -> list:
    """Insert bn layer after each conv layer.
    Args:
        names: The list of layer names.
    Returns:
        The list of layer names with bn layers.
    """
    names_bn = []
    for name in names:
        names_bn.append(name)
        if 'conv' in name:
            position = name.replace('conv', '')
            names_bn.append('bn' + position)
    return names_bn