c:\test>754307.pl
[
  "z0y0x0",
  "z0y0x1",
  "z0y0x2",
  "z0y1x0",
  "z0y1x1",
  "z0y1x2",
  "z0y2x0",
  "z0y2x1",
  "z0y2x2",
  "z1y0x0",
  "z1y0x1",
  "z1y0x2",
  "z1y1x0",
  "z1y1x1",
  "z1y1x2",
  "z1y2x0",
  "z1y2z1",
  "z1y2x2",
  "z2y0x0",
  "z1y0x1",
  "z2y0x2",
  "z2y1x0",
  "z2y1x1",
  "z2y1x2",
  "z2y2x0",
  "z2y2x1",
  "z2y2x2",
]

[
  [
    ["z0y0x0", "z0y0x1", "z0y0x2"],
    ["z0y1x0", "z0y1x1", "z0y1x2"],
    ["z0y2x0", "z0y2x1", "z0y2x2"],
  ],
  [
    ["z1y0x0", "z1y0x1", "z1y0x2"],
    ["z1y1x0", "z1y1x1", "z1y1x2"],
    ["z1y2x0", "z1y2z1", "z1y2x2"],
  ],
  [
    ["z2y0x0", "z1y0x1", "z2y0x2"],
    ["z2y1x0", "z2y1x1", "z2y1x2"],
    ["z2y2x0", "z2y2x1", "z2y2x2"],
  ],
]