You are given a code:

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

Can you predict the output of `main_solution("boiad")` 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": "boiad"}, "ref_output": "d|x|m|u|v|q|w|f|r|n", "ref_code": "def main_solution(x):\n    return func_13(func_20('dmvwr', 'xuqfn'), '|')", "funcname": "main_solution"}
rule