You are given a code:

def main_solution(x):
    return func_13((x + 'zyqdhh'), '|')

Can you predict the output of `main_solution("xhkjrx")` 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": "xhkjrx"}, "ref_output": "x|h|k|j|r|x|z|y|q|d|h|h", "ref_code": "def main_solution(x):\n    return func_13((x + 'zyqdhh'), '|')", "funcname": "main_solution"}
rule