You are given a code:

def main_solution(x):
    return func_5(func_20('nacdp', 'nhq'), 'swf')

Can you predict the output of `main_solution("utrjznlbr")` 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": "utrjznlbr"}, "ref_output": "swfnnahcqdp", "ref_code": "def main_solution(x):\n    return func_5(func_20('nacdp', 'nhq'), 'swf')", "funcname": "main_solution"}
rule