L+L-1L+L-2L+L-3L+L-5L+L-6L+L-8L+L-9L+L-11L+L-14L+L-15L+L-16L+L-17L+L-18L+L-20L+L-21L+L-22L+L-24L+L-25L+L-26L+L-28