You are given a code:

def main_solution(x):
    return func_20(('tjnq' + 'ags'), func_15('fde'))

Can you predict the output of `main_solution("vep")` 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": "vep"}, "ref_output": "t\u00abjfn\u00bbq\u00abadg\u00bbs\u00abe\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('tjnq' + 'ags'), func_15('fde'))", "funcname": "main_solution"}
rule