You are given a code:

def main_solution(x):
    return func_20(('qii' + 'evj'), func_13('rafedg', '-'))

Can you predict the output of `main_solution("ctcpzwo")` 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": "ctcpzwo"}, "ref_output": "qri-iae-vfj-e-d-g", "ref_code": "def main_solution(x):\n    return func_20(('qii' + 'evj'), func_13('rafedg', '-'))", "funcname": "main_solution"}
rule