PUZZLE #4676: Coordinate Lattice (diff 6)

lattice learn difficulty: 6/7 reason author: system unsolved

An 7x7 grid maps coordinates to letters. Follow the coordinates to decode the password.

DATA

Grid	`['P', 'I', 'T', 'N', 'E', 'X', 'Y'], ['E', 'P', 'D', 'Y', 'C', 'L', 'N'], ['E', 'T', 'R', 'N', 'F', 'A', 'L'], ['A', 'O', 'R', 'O', 'Q', 'G', 'Z'], ['A', 'D', 'I', 'G', 'R', 'N', 'Z'], ['H', 'Q', 'J', 'N', 'L', '_', 'C'], ['T', 'W', 'R', 'Z', 'O', 'V', 'P']`
Coordinates	`[3, 0], [4, 4], [3, 5], [1, 0], [6, 0], [0, 0], [0, 6], [4, 1], [5, 6], [6, 4], [6, 2], [1, 1], [5, 0], [1, 4], [5, 5], [1, 6], [3, 3], [0, 1]`
Size	`7`
Order	`shuffled`
Hint	`Map each [row, col] coordinate to its cell in the 7x7 grid. Coordinates are shuffled. The answer may contain underscores which represent spaces.`
Answer Format	`integer coordinate pair: x,y (e.g., "3,7")`

{
  "type": "lattice",
  "grid": [
    [
      "P",
      "I",
      "T",
      "N",
      "E",
      "X",
      "Y"
    ],
    [
      "E",
      "P",
      "D",
      "Y",
      "C",
      "L",
      "N"
    ],
    [
      "E",
      "T",
      "R",
      "N",
      "F",
      "A",
      "L"
    ],
    [
      "A",
      "O",
      "R",
      "O",
      "Q",
      "G",
      "Z"
    ],
    [
      "A",
      "D",
      "I",
      "G",
      "R",
      "N",
      "Z"
    ],
    [
      "H",
      "Q",
      "J",
      "N",
      "L",
      "_",
      "C"
    ],
    [
      "T",
      "W",
      "R",
      "Z",
      "O",
      "V",
      "P"
    ]
  ],
  "coordinates": [
    [
      3,
      0
    ],
    [
      4,
      4
    ],
    [
      3,
      5
    ],
    [
      1,
      0
    ],
    [
      6,
      0
    ],
    [
      0,
      0
    ],
    [
      0,
      6
    ],
    [
      4,
      1
    ],
    [
      5,
      6
    ],
    [
      6,
      4
    ],
    [
      6,
      2
    ],
    [
      1,
      1
    ],
    [
      5,
      0
    ],
    [
      1,
      4
    ],
    [
      5,
      5
    ],
    [
      1,
      6
    ],
    [
      3,
      3
    ],
    [
      0,
      1
    ]
  ],
  "size": 7,
  "order": "shuffled",
  "hint": "Map each [row, col] coordinate to its cell in the 7x7 grid. Coordinates are shuffled. The answer may contain underscores which represent spaces.",
  "answer_format": "integer coordinate pair: x,y (e.g., \"3,7\")"
}

author's note: Pool fill: lattice diff 6