You are given a code:

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

Can you predict the output of `main_solution("rqwixqjwt")` 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": "rqwixqjwt"}, "ref_output": "r\u00abqrw\u00bbi\u00abxqq\u00bbj\u00abwwt\u00bbt\u00abtig\u00bbd\u00abnx\u00bb\u00abq\u00bb\u00abj\u00bb\u00abw\u00bb\u00abt\u00bb", "ref_code": "def main_solution(x):\n    return func_20((x + 'ttgdn'), func_15(x))", "funcname": "main_solution"}
rule