You are given a code:

def main_solution(x):
    return (func_15('fqpcz') + func_13('gwfik', '_'))

Can you predict the output of `main_solution("ibcpazk")` 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": "ibcpazk"}, "ref_output": "\u00abf\u00bb\u00abq\u00bb\u00abp\u00bb\u00abc\u00bb\u00abz\u00bbg_w_f_i_k", "ref_code": "def main_solution(x):\n    return (func_15('fqpcz') + func_13('gwfik', '_'))", "funcname": "main_solution"}
rule