You are given a code:

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

Can you predict the output of `main_solution("uzehis")` 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": "uzehis"}, "ref_output": "\u00abfus\u00bba\u00abqzf\u00bbp\u00abcee\u00bbc\u00abh\u00bb\u00abi\u00bb\u00abs\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), ('fsaqf' + 'pcec'))", "funcname": "main_solution"}
rule