You are given a code:

def main_solution(x):
    return func_20(func_15('lfo'), ('ktbq').swapcase())

Can you predict the output of `main_solution("hnpcrs")` 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": "hnpcrs"}, "ref_output": "\u00abKlT\u00bbB\u00abQf\u00bb\u00abo\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('lfo'), ('ktbq').swapcase())", "funcname": "main_solution"}
rule