You are given a code:

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

Can you predict the output of `main_solution("vugajqld")` 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": "vugajqld"}, "ref_output": "i\u00abrmo\u00bbv\u00abulg\u00bba\u00abjiq\u00bbl\u00abds\u00bb\u00abu\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('iro' + x), func_15('mlisu'))", "funcname": "main_solution"}
rule