You are given a code:

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

Can you predict the output of `main_solution("ysippgccs")` 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": "ysippgccs"}, "ref_output": "y|s|i|p|p|g|c|c|s\u00abj\u00bb\u00abs\u00bb\u00abl\u00bb", "ref_code": "def main_solution(x):\n    return (func_13(x, '|') + func_15('jsl'))", "funcname": "main_solution"}
rule