You are given a code:

def main_solution(x):
    return func_20(func_13(x, '|'), (x + 'irnyl'))

Can you predict the output of `main_solution("jkvdqqvyf")` 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": "jkvdqqvyf"}, "ref_output": "jj|kkv|dvq|qdv|yqf|iqr|nvy|ly|f", "ref_code": "def main_solution(x):\n    return func_20(func_13(x, '|'), (x + 'irnyl'))", "funcname": "main_solution"}
rule