You are given a code:

def main_solution(x):
    return (func_15('pangi') + func_13(x, '|'))

Can you predict the output of `main_solution("feyjrseqa")` 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": "feyjrseqa"}, "ref_output": "\u00abp\u00bb\u00aba\u00bb\u00abn\u00bb\u00abg\u00bb\u00abi\u00bbf|e|y|j|r|s|e|q|a", "ref_code": "def main_solution(x):\n    return (func_15('pangi') + func_13(x, '|'))", "funcname": "main_solution"}
rule