{
  "format": "{area}-{group}-{serial}",
  "area": [
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    { "format": "0{int(10,99)}", "weight": 90 },
    { "format": "{int(100,665)}", "weight": 566 },
    { "format": "{int(667,899)}", "weight": 233 }
  ],
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    { "format": "0{int(100,999)}", "weight": 900 },
    { "format": "{int(1000,9999)}", "weight": 9000 }
  ]
}