You are given a code:

def main_solution(x):
    return (func_13('jbcizk', '-') + func_19('ogynnp', 1))

Can you predict the output of `main_solution("vdv")` 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": "vdv"}, "ref_output": "j-b-c-i-z-kgynnpo", "ref_code": "def main_solution(x):\n    return (func_13('jbcizk', '-') + func_19('ogynnp', 1))", "funcname": "main_solution"}
rule