def multipole_label(T,L):
    """Get multipole label.
            T = 0 (electric), 1(magnetic)
            L = 0,1,2... (order)
    """
    first = ['e', 'm'][T]
    if L <= 3:
        last = ['D', 'Q', 'O', 'H'][L]
    else:
        last = " (L = {L})".format(L=L)
    return first + last