You are given a code:

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

Can you predict the output of `main_solution("bjvgepbnj")` 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": "bjvgepbnj"}, "ref_output": "\u00abtbj\u00bby\u00abbjj\u00bbv\u00abgve\u00bbp\u00abbgn\u00bbj\u00abe\u00bb\u00abp\u00bb\u00abb\u00bb\u00abn\u00bb\u00abj\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_5(x, 'tjy'))", "funcname": "main_solution"}
rule