You are given a code:

def main_solution(x):
    return func_20(func_23('yxjnq', 2), func_5('vmld', 'jk'))

Can you predict the output of `main_solution("kemepf")` 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": "kemepf"}, "ref_output": "yjxkjvnmql1d", "ref_code": "def main_solution(x):\n    return func_20(func_23('yxjnq', 2), func_5('vmld', 'jk'))", "funcname": "main_solution"}
rule