You are given a code:

def main_solution(x):
    return (func_13('fqngy', '-') + func_15('mal'))

Can you predict the output of `main_solution("ceque")` 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": "ceque"}, "ref_output": "f-q-n-g-y\u00abm\u00bb\u00aba\u00bb\u00abl\u00bb", "ref_code": "def main_solution(x):\n    return (func_13('fqngy', '-') + func_15('mal'))", "funcname": "main_solution"}
rule