You are given a code:

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

Can you predict the output of `main_solution("eutzplpkr")` 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": "eutzplpkr"}, "ref_output": "e|u|t|z|p|l|p|k|r|l|r|c", "ref_code": "def main_solution(x):\n    return func_13((x + 'lrc'), '|')", "funcname": "main_solution"}
rule