You are given a code:

def main_solution(x):
    return func_20(func_20('qxnfp', x), func_15('itgz'))

Can you predict the output of `main_solution("dctsqumtkb")` 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": "dctsqumtkb"}, "ref_output": "q\u00abdix\u00bbc\u00abntt\u00bbf\u00absgp\u00bbq\u00abuzm\u00bbtkb", "ref_code": "def main_solution(x):\n    return func_20(func_20('qxnfp', x), func_15('itgz'))", "funcname": "main_solution"}
rule