You are given a code:

def main_solution(x):
    return func_5(func_5('urj', 'pqqb'), 'kmlz')

Can you predict the output of `main_solution("rurglxxb")` 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": "rurglxxb"}, "ref_output": "kmlzpqqburj", "ref_code": "def main_solution(x):\n    return func_5(func_5('urj', 'pqqb'), 'kmlz')", "funcname": "main_solution"}
rule