You are given a code:

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

Can you predict the output of `main_solution("exkguagaj")` 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": "exkguagaj"}, "ref_output": "h|e|s|e|x|k|g|u|a|g|a|j", "ref_code": "def main_solution(x):\n    return func_13(('hes' + x), '|')", "funcname": "main_solution"}
rule