You are given a code:

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

Can you predict the output of `main_solution("rvcbqcodng")` 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": "rvcbqcodng"}, "ref_output": "\u00ab|s|\u00bb|\u00ab|r|\u00bb|\u00ab|g|\u00bb|\u00ab|f|\u00bb", "ref_code": "def main_solution(x):\n    return func_13(func_15('srgf'), '|')", "funcname": "main_solution"}
rule