You are given a code:

def main_solution(x):
    return func_20(func_20(x, 'ceqw'), func_15('aflgiv'))

Can you predict the output of `main_solution("dstnjpx")` 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": "dstnjpx"}, "ref_output": "d\u00abcas\u00bbe\u00abtfq\u00bbn\u00abwlj\u00bbp\u00abxg\u00bb\u00abi\u00bb\u00abv\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, 'ceqw'), func_15('aflgiv'))", "funcname": "main_solution"}
rule