You are given a code:

def main_solution(x):
    return (func_13('gxglpq', '|') + ('fnkl' + 'yyyqk'))

Can you predict the output of `main_solution("yrtmgkgtjh")` 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": "yrtmgkgtjh"}, "ref_output": "g|x|g|l|p|qfnklyyyqk", "ref_code": "def main_solution(x):\n    return (func_13('gxglpq', '|') + ('fnkl' + 'yyyqk'))", "funcname": "main_solution"}
rule