You are given a code:

def main_solution(x):
    return func_20(func_3('qbhza'), func_13('bkpncv', '_'))

Can you predict the output of `main_solution("voasgr")` 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": "voasgr"}, "ref_output": "abb_hkq_zp_n_c_v", "ref_code": "def main_solution(x):\n    return func_20(func_3('qbhza'), func_13('bkpncv', '_'))", "funcname": "main_solution"}
rule