You are given a code:

def main_solution(x):
    return func_20(func_20('hnmrlr', x), func_15(x))

Can you predict the output of `main_solution("ltdkawvbml")` 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": "ltdkawvbml"}, "ref_output": "h\u00ablln\u00bbt\u00abmtd\u00bbr\u00abkdl\u00bba\u00abrkw\u00bbv\u00abbam\u00bbl\u00abw\u00bb\u00abv\u00bb\u00abb\u00bb\u00abm\u00bb\u00abl\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20('hnmrlr', x), func_15(x))", "funcname": "main_solution"}
rule