You are given a code:

def main_solution(x):
    return (func_15('cesg') + func_13('tcbkh', '_'))

Can you predict the output of `main_solution("uih")` 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": "uih"}, "ref_output": "\u00abc\u00bb\u00abe\u00bb\u00abs\u00bb\u00abg\u00bbt_c_b_k_h", "ref_code": "def main_solution(x):\n    return (func_15('cesg') + func_13('tcbkh', '_'))", "funcname": "main_solution"}
rule