You are given a code:

def main_solution(x):
    return func_20(func_13(x, '-'), func_15('kika'))

Can you predict the output of `main_solution("wkknraved")` 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": "wkknraved"}, "ref_output": "w\u00ab-kk\u00bb-\u00abki-\u00bbn\u00ab-kr\u00bb-\u00abaa-\u00bbv-e-d", "ref_code": "def main_solution(x):\n    return func_20(func_13(x, '-'), func_15('kika'))", "funcname": "main_solution"}
rule