[
    {
        "size": 6,
        "group_size_range": [
            2,
            3
        ]
    },
    {
        "size": 4,
        "group_size_range": [
            1,
            2
        ]
    },
    {
        "size": 6,
        "group_size_range": [
            2,
            4
        ]
    },
    {
        "size": 4,
        "group_size_range": [
            2,
            3
        ]
    }
]