You are given a code:

def main_solution(x):
    return func_20(func_20(x, 'ygrc'), func_15('mpgni'))

Can you predict the output of `main_solution("nhyo")` 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": "nhyo"}, "ref_output": "n\u00abymh\u00bbg\u00abypr\u00bbo\u00abcg\u00bb\u00abn\u00bb\u00abi\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, 'ygrc'), func_15('mpgni'))", "funcname": "main_solution"}
rule