You are given a code:

def main_solution(x):
    return ((x).capitalize() + func_13('hxyeee', '|'))

Can you predict the output of `main_solution("rffyjvf")` 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": "rffyjvf"}, "ref_output": "Rffyjvfh|x|y|e|e|e", "ref_code": "def main_solution(x):\n    return ((x).capitalize() + func_13('hxyeee', '|'))", "funcname": "main_solution"}
rule