You are given a code:

def main_solution(x):
    return func_20(func_15('aifs'), (x + 'lwtzs'))

Can you predict the output of `main_solution("pqjdrahii")` 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": "pqjdrahii"}, "ref_output": "\u00abpaq\u00bbj\u00abdir\u00bba\u00abhfi\u00bbi\u00ablsw\u00bbtzs", "ref_code": "def main_solution(x):\n    return func_20(func_15('aifs'), (x + 'lwtzs'))", "funcname": "main_solution"}
rule