You are given a code:

def main_solution(x):
    return func_20((x + 'ish'), func_15('zeui'))

Can you predict the output of `main_solution("paqvwon")` 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": "paqvwon"}, "ref_output": "p\u00abazq\u00bbv\u00abweo\u00bbn\u00abius\u00bbh\u00abi\u00bb", "ref_code": "def main_solution(x):\n    return func_20((x + 'ish'), func_15('zeui'))", "funcname": "main_solution"}
rule