You are given a code:

def main_solution(x):
    return func_13('uahzpz', '|')

Can you predict the output of `main_solution("ypymrttgrt")` 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": "ypymrttgrt"}, "ref_output": "u|a|h|z|p|z", "ref_code": "def main_solution(x):\n    return func_13('uahzpz', '|')", "funcname": "main_solution"}
rule