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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def prettify_json(json_string):
 """Given a JSON string, it returns it as a safe formatted HTML"""

    try:
        data = json.loads(json_string)
        html = '<pre>' + json.dumps(data, sort_keys=True, indent=4) + '</pre>'
    except:
        html = json_string
    return mark_safe(html)