You are given a code:

def main_solution(x):
    return func_20(func_5('owsbv', 'ktgc'), func_15('mbe'))

Can you predict the output of `main_solution("pgv")` 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": "pgv"}, "ref_output": "k\u00abtmg\u00bbc\u00abobw\u00bbs\u00abbev\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5('owsbv', 'ktgc'), func_15('mbe'))", "funcname": "main_solution"}
rule