You are given a code:

def main_solution(x):
    return (func_5('ebr', 'hvnh') + func_13('jgznfz', '_'))

Can you predict the output of `main_solution("pyoowzb")` 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": "pyoowzb"}, "ref_output": "hvnhebrj_g_z_n_f_z", "ref_code": "def main_solution(x):\n    return (func_5('ebr', 'hvnh') + func_13('jgznfz', '_'))", "funcname": "main_solution"}
rule