hull not allowed to go right on the upper-left side, or up on the lower-right side.
hull not allowed to go right on the upper-left side, or up on the lower-right
side.

weidezhang/dht,weidezhang/dht,sit/dht,sit/dht,weidezhang/dht,sit/dht,sit/dht,weidezhang/dht,weidezhang/dht,sit/dht