You are given a code:

def main_solution(x):
    return ('uur' + 'nljm')

Can you predict the output of `main_solution("hzggc")` without writing any code? Please reason and put your final answer in the following json format: {"output": <your output>}, where <your output> should be the final string.
user
{"ref_input": {"x": "hzggc"}, "ref_output": "uurnljm", "ref_code": "def main_solution(x):\n    return ('uur' + 'nljm')", "funcname": "main_solution"}
rule