You are given a code:

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

Can you predict the output of `main_solution("iwewwjsiax")` 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": "iwewwjsiax"}, "ref_output": "\u00abii-\u00bbl\u00ab-wh\u00bb-\u00abte\u00bb\u00abw\u00bb\u00abw\u00bb\u00abj\u00bb\u00abs\u00bb\u00abi\u00bb\u00aba\u00bb\u00abx\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_13('ilht', '-'))", "funcname": "main_solution"}
rule