You are given a code:

def main_solution(x):
    return func_20(func_20(x, 'vsm'), func_15('dkdr'))

Can you predict the output of `main_solution("jcrvwoj")` 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": "jcrvwoj"}, "ref_output": "j\u00abvdc\u00bbs\u00abrkm\u00bbv\u00abwdo\u00bbj\u00abr\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, 'vsm'), func_15('dkdr'))", "funcname": "main_solution"}
rule