You are given a code:

def main_solution(x):
    return func_20('uhftca', 'iqplm')

Can you predict the output of `main_solution("njp")` 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": "njp"}, "ref_output": "uihqfptlcma", "ref_code": "def main_solution(x):\n    return func_20('uhftca', 'iqplm')", "funcname": "main_solution"}
rule