You are given a code:

def main_solution(x):
    return func_20(func_15(x), ('nyxny' + x))

Can you predict the output of `main_solution("nlssijc")` 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": "nlssijc"}, "ref_output": "\u00abnny\u00bbx\u00abnly\u00bbn\u00ablss\u00bbs\u00abisj\u00bbc\u00abi\u00bb\u00abj\u00bb\u00abc\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), ('nyxny' + x))", "funcname": "main_solution"}
rule