You are given a code:

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

Can you predict the output of `main_solution("etcvboleh")` 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": "etcvboleh"}, "ref_output": "e|t|c|v|b|o|l|e|h|d|q|r|j|d|u", "ref_code": "def main_solution(x):\n    return func_13((x + 'dqrjdu'), '|')", "funcname": "main_solution"}
rule