You are given a code:

def main_solution(x):
    return func_20((x + 'xiiqth'), func_15(x))

Can you predict the output of `main_solution("yanztd")` 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": "yanztd"}, "ref_output": "y\u00abayn\u00bbz\u00abtad\u00bbx\u00abini\u00bbq\u00abtzh\u00bb\u00abt\u00bb\u00abd\u00bb", "ref_code": "def main_solution(x):\n    return func_20((x + 'xiiqth'), func_15(x))", "funcname": "main_solution"}
rule