You are given a code:

def main_solution(x):
    return func_13(func_15('yhaclf'), '-')

Can you predict the output of `main_solution("ihi")` 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": "ihi"}, "ref_output": "\u00ab-y-\u00bb-\u00ab-h-\u00bb-\u00ab-a-\u00bb-\u00ab-c-\u00bb-\u00ab-l-\u00bb-\u00ab-f-\u00bb", "ref_code": "def main_solution(x):\n    return func_13(func_15('yhaclf'), '-')", "funcname": "main_solution"}
rule