You are given a code:

def main_solution(x):
    return func_5((x + 'zidfa'), 'pcqk')

Can you predict the output of `main_solution("aykkisr")` 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": "aykkisr"}, "ref_output": "pcqkaykkisrzidfa", "ref_code": "def main_solution(x):\n    return func_5((x + 'zidfa'), 'pcqk')", "funcname": "main_solution"}
rule