I have the following JSON: 
{
    "id": "X",
    "transaction_details": {
        "location": "X"
    }
}
The "id" key is taking the following values: null, "en", "br", "gr", "bu"
For each of the above ids, have the "location" key with the "locationX" value, where X represents all numbers from 1 to 10. So you should have 50 JSONs. Write the JSONs minified, comma-separated. The letter u should appear at least 41 times.
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