You are given a code:

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

Can you predict the output of `main_solution("wtymdfzsjf")` 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": "wtymdfzsjf"}, "ref_output": "w\u00abtwy\u00bbm\u00abdtf\u00bbz\u00absyj\u00bbf\u00abmmq\u00bbb\u00abzdz\u00bb\u00abf\u00bb\u00abz\u00bb\u00abs\u00bb\u00abj\u00bb\u00abf\u00bb", "ref_code": "def main_solution(x):\n    return func_20((x + 'mqbzz'), func_15(x))", "funcname": "main_solution"}
rule