You are given a code:

def main_solution(x):
    return func_20('loqk', 'piji')

Can you predict the output of `main_solution("mzxbvqsdq")` 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": "mzxbvqsdq"}, "ref_output": "lpoiqjki", "ref_code": "def main_solution(x):\n    return func_20('loqk', 'piji')", "funcname": "main_solution"}
rule