{
  "deep-water": [
    "water",
    "deep-water"
  ],
  "water": [
    "sand",
    "deep-water",
    "water"
  ],
  "sand": [
    "sand",
    "water",
    "dirt"
  ],
  "dirt": [
    "dirt",
    "grass",
    "sand"
  ],
  "grass": [
    "dirt",
    "grass",
    "saplings",
    "flowers"
  ],
  "flowers": [
    "grass",
    "saplings"
  ],
  "saplings": [
    "grass",
    "saplings",
    "trees"
  ],
  "trees": [
    "saplings",
    "trees"
  ]
}