( 0 2 4 18682 l( 1 0 7 14461 l( 3 0 3 10509 l( 5 0 8 7442 l( 7 2 9 4449 l( 9 -1 -1 2148 l r ) r( 10 0 9 2301 l( 13 -1 -1 1121 l r ) r( 14 -1 -1 1180 l r ) ) ) r( 8 2 9 2993 l( 19 -1 -1 1501 l r ) r( 20 -1 -1 1492 l r ) ) ) r( 6 -1 -1 3067 l r ) ) r( 4 -1 -1 3952 l r ) ) r( 2 -1 -1 4221 l r ) )
5 20
