def get_l2_cols(names):
	"""
    Extract column names related to Layer 2 
    
    Parameters
    ----------
    names : list
        list with column names
    
    Returns
    -------
    list
        list containing only Layer 2 column names
    """
	ret_names = []
	for n in names:
		if "RtGAMSE" in n: continue 
		if "RtGAM" in n: ret_names.append(n)
	return(ret_names)