You are given a code:

def main_solution(x):
    return (func_13('boovtv', '_') + func_20('jhwjtm', 'wycxg'))

Can you predict the output of `main_solution("cdnqroj")` 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": "cdnqroj"}, "ref_output": "b_o_o_v_t_vjwhywcjxtgm", "ref_code": "def main_solution(x):\n    return (func_13('boovtv', '_') + func_20('jhwjtm', 'wycxg'))", "funcname": "main_solution"}
rule