You are given a code:

def main_solution(x):
    return func_20(func_22('osr'), func_3(x))

Can you predict the output of `main_solution("vrasxtqr")` 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": "vrasxtqr"}, "ref_output": "oasqrrstvx", "ref_code": "def main_solution(x):\n    return func_20(func_22('osr'), func_3(x))", "funcname": "main_solution"}
rule