You are given a code:

def main_solution(x):
    return func_20(func_1('skk', 4), func_15('yrjh'))

Can you predict the output of `main_solution("lsjbbli")` 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": "lsjbbli"}, "ref_output": "s\u00abkyk\u00bbs\u00abkrk\u00bbs\u00abkjk\u00bbs\u00abkhk\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_1('skk', 4), func_15('yrjh'))", "funcname": "main_solution"}
rule