[
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            5
        ],
        "difficulty": "easy"
    },
    {
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            5
        ],
        "difficulty": "medium"
    },
    {
        "size": [
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            5
        ],
        "difficulty": "hard"
    },
    {
        "size": [
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            7
        ],
        "difficulty": "easy"
    },
    {
        "size": [
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            7
        ],
        "difficulty": "medium"
    },
    {
        "size": [
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            7
        ],
        "difficulty": "hard"
    },
    {
        "size": [
            3,
            3
        ],
        "difficulty": "easy"
    },
    {
        "size": [
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            3
        ],
        "difficulty": "medium"
    },
    {
        "size": [
            3,
            3
        ],
        "difficulty": "hard"
    },
    {
        "size": [
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            6
        ],
        "difficulty": "easy"
    },
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            6
        ],
        "difficulty": "medium"
    },
    {
        "size": [
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            6
        ],
        "difficulty": "hard"
    }
]