You are given a code:

def main_solution(x):
    return func_20(func_20(x, 'csvsy'), func_15('xsmf'))

Can you predict the output of `main_solution("vmqrlhsi")` 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": "vmqrlhsi"}, "ref_output": "v\u00abcxm\u00bbs\u00abqsv\u00bbr\u00absml\u00bby\u00abhfs\u00bbi", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, 'csvsy'), func_15('xsmf'))", "funcname": "main_solution"}
rule