You are given a code:

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

Can you predict the output of `main_solution("cgrh")` 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": "cgrh"}, "ref_output": "\u00abckg\u00bbr\u00abhrx\u00bbo\u00abmgi\u00bbm\u00abvw\u00bb\u00abe\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('krgwe'), (x + 'xomimv'))", "funcname": "main_solution"}
rule