( 0 2 4 5440 l( 1 0 3 4265 l( 3 0 7 2939 l( 5 0 8 1729 l( 7 -1 -1 753 l r ) r( 8 -1 -1 976 l r ) ) r( 6 3 7 1210 l( 13 -1 -1 711 l r ) r( 14 -1 -1 499 l r ) ) ) r( 4 0 7 1326 l( 19 -1 -1 1000 l r ) r( 20 -1 -1 326 l r ) ) ) r( 2 2 9 1175 l( 23 -1 -1 972 l r ) r( 24 -1 -1 203 l r ) ) )
5 20
