ref: e8b4511fb5e8a1e6134b3bcc400df729aa975a83
dir: /examples/misc/echoes.orca/
......................................... .#.ECHOES.#.............................. ......................................... .22O..................................... .aV.22O.................................. .......22O............................... ..........22O............................ .............22O......................... ................22O...................... ...................22O................... ......................22O................ .........................22O............. ............................22O.......... .................................Va...... .................................1....... .........................................