You are given a code:

def main_solution(x):
    return func_20(('gdowmt' + 'vcc'), func_15('eex'))

Can you predict the output of `main_solution("jfcivibxzy")` 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": "jfcivibxzy"}, "ref_output": "g\u00abdeo\u00bbw\u00abmet\u00bbv\u00abcxc\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('gdowmt' + 'vcc'), func_15('eex'))", "funcname": "main_solution"}
rule