You are given a code:

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

Can you predict the output of `main_solution("cswilf")` 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": "cswilf"}, "ref_output": "c|s|w|i|l|f|f|i|y|x|g|i", "ref_code": "def main_solution(x):\n    return func_13((x + 'fiyxgi'), '|')", "funcname": "main_solution"}
rule