You are given a code:

def main_solution(x):
    return (func_23('ewwz', 2) + func_13('ftqgxv', '|'))

Can you predict the output of `main_solution("wkfe")` 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": "wkfe"}, "ref_output": "ewwz1f|t|q|g|x|v", "ref_code": "def main_solution(x):\n    return (func_23('ewwz', 2) + func_13('ftqgxv', '|'))", "funcname": "main_solution"}
rule