P+H-1P+H-2P+H-3P+H-4P+H-5P+H-6P+H-7P+H-8P+H-9P+H-10P+H-11P+H-12P+H-13P+H-14P+H-15P+H-16P+H-17P+H-18P+H-19P+H-20