def s_sets(p_map, p_key_f, p_key_b, p_value):
    """
    s_sets(p_map, p_key_f, p_key_b, p_value)->None
    """
    try:
        if p_key_f not in p_map:
            p_map[p_key_f] = {p_key_b: p_value}
        else:
            p_map[p_key_f][p_key_b] = p_value
    except:
        return
