You are given a code:

def main_solution(x):
    return func_20(('goodt' + 'nny'), func_15('sngy'))

Can you predict the output of `main_solution("qeuyz")` 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": "qeuyz"}, "ref_output": "g\u00aboso\u00bbd\u00abtnn\u00bbn\u00abyg\u00bb\u00aby\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('goodt' + 'nny'), func_15('sngy'))", "funcname": "main_solution"}
rule