You are given a code:

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

Can you predict the output of `main_solution("tmujmppnrc")` 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": "tmujmppnrc"}, "ref_output": "u\u00abotv\u00bbg\u00abtmm\u00bbu\u00abjum\u00bbp\u00abpjn\u00bbr\u00abcm\u00bb\u00abp\u00bb\u00abp\u00bb\u00abn\u00bb\u00abr\u00bb\u00abc\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('uovg' + x), func_15(x))", "funcname": "main_solution"}
rule