ref: 7efd7e49120af31c6600effbe2f94b6618a020b5
dir: /examples/subtraction.orca/
......................................... .#.SUBTRACTION.#......................... ......................................... .13X9.#.A.#.............................. .01X4.#.B.#.............................. ......................................... ...4zT0zyxwvutsrqponmlkjihgfedcba98765432 ...A9w................................... .rV5..................................... ............Vr........................... .#.RESULT.#.5............................ ......................................... ......................................... ......................................... ......................................... .........................................