You are given a code:

def main_solution(x):
    return func_20(func_13(x, '_'), func_15('rxvoe'))

Can you predict the output of `main_solution("pqbmosiee")` 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": "pqbmosiee"}, "ref_output": "p\u00ab_rq\u00bb_\u00abbx_\u00bbm\u00ab_vo\u00bb_\u00abso_\u00bbi\u00ab_ee\u00bb_e", "ref_code": "def main_solution(x):\n    return func_20(func_13(x, '_'), func_15('rxvoe'))", "funcname": "main_solution"}
rule