You are given a code:

def main_solution(x):
    return func_20(('eogsp' + 'kwng'), func_15('zoi'))

Can you predict the output of `main_solution("iacvfck")` 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": "iacvfck"}, "ref_output": "e\u00abozg\u00bbs\u00abpok\u00bbw\u00abnig\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('eogsp' + 'kwng'), func_15('zoi'))", "funcname": "main_solution"}
rule