You are given a code:

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

Can you predict the output of `main_solution("ampckpeg")` 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": "ampckpeg"}, "ref_output": "l|i|t|d|s|n|j|v|y|v|d|x", "ref_code": "def main_solution(x):\n    return func_13(('litdsn' + 'jvyvdx'), '|')", "funcname": "main_solution"}
rule