You are given a code:

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

Can you predict the output of `main_solution("kcjywitw")` 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": "kcjywitw"}, "ref_output": "k|c|j|y|w|i|t|w|w|r|j|r|f|n", "ref_code": "def main_solution(x):\n    return func_13((x + 'wrjrfn'), '|')", "funcname": "main_solution"}
rule