( 0 2 9 1798 l( 1 0 8 1579 l( 3 3 10 1243 l( 5 -1 -1 967 l r ) r( 6 -1 -1 276 l r ) ) r( 4 -1 -1 336 l r ) ) r( 2 -1 -1 219 l r ) )
5 20
