[
  {
    "GroupType": "Common",
    "Weight": 10,
    "MonsterRare": "S"
  },
  {
    "GroupType": "Common",
    "Weight": 60,
    "MonsterRare": "A"
  },
  {
    "GroupType": "Common",
    "Weight": 30,
    "MonsterRare": "B"
  },
  {
    "GroupType": "Preparatory",
    "Weight": 0,
    "MonsterRare": "S"
  },
  {
    "GroupType": "Preparatory",
    "Weight": 40,
    "MonsterRare": "A"
  },
  {
    "GroupType": "Preparatory",
    "Weight": 60,
    "MonsterRare": "B"
  }
]