You are given a code:

def main_solution(x):
    return func_20(func_5(x, 'qb'), func_15(x))

Can you predict the output of `main_solution("bdlxqwifzs")` 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": "bdlxqwifzs"}, "ref_output": "q\u00abbbb\u00bbd\u00abldx\u00bbq\u00abwli\u00bbf\u00abzxs\u00bb\u00abq\u00bb\u00abw\u00bb\u00abi\u00bb\u00abf\u00bb\u00abz\u00bb\u00abs\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5(x, 'qb'), func_15(x))", "funcname": "main_solution"}
rule