You are given a code:

def main_solution(x):
    return func_20(func_15('islmfs'), func_1('vknska', 3))

Can you predict the output of `main_solution("mocmm")` 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": "mocmm"}, "ref_output": "\u00abvik\u00bbn\u00abssk\u00bba\u00abvlk\u00bbn\u00absmk\u00bba\u00abvfk\u00bbn\u00abssk\u00bba", "ref_code": "def main_solution(x):\n    return func_20(func_15('islmfs'), func_1('vknska', 3))", "funcname": "main_solution"}
rule