You are given a code:

def main_solution(x):
    return func_20(('gqidxu').capitalize(), func_4('lxi'))

Can you predict the output of `main_solution("qurphmsz")` 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": "qurphmsz"}, "ref_output": "Glqxiidxu", "ref_code": "def main_solution(x):\n    return func_20(('gqidxu').capitalize(), func_4('lxi'))", "funcname": "main_solution"}
rule