You are given a code:

def main_solution(x):
    return func_13(func_20('iuotbs', x), '|')

Can you predict the output of `main_solution("dykutufnmo")` 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": "dykutufnmo"}, "ref_output": "i|d|u|y|o|k|t|u|b|t|s|u|f|n|m|o", "ref_code": "def main_solution(x):\n    return func_13(func_20('iuotbs', x), '|')", "funcname": "main_solution"}
rule