You are given a code:

def main_solution(x):
    return (func_15('twcatz') + func_13('kiird', '|'))

Can you predict the output of `main_solution("yidz")` 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": "yidz"}, "ref_output": "\u00abt\u00bb\u00abw\u00bb\u00abc\u00bb\u00aba\u00bb\u00abt\u00bb\u00abz\u00bbk|i|i|r|d", "ref_code": "def main_solution(x):\n    return (func_15('twcatz') + func_13('kiird', '|'))", "funcname": "main_solution"}
rule