ref: 9b81391d76eb3c2c4a14ec82b9b52b8f83875f0a
dir: /examples/filter.orca/
......................................... .# FILTER.#.............................. ......................................... ......................................... ......................................... ...............gD........................ ......8D.H............................... ........gE......u........................ ......................................... ......................................... ......................................... ......................................... .........................................