You are given a code:

def main_solution(x):
    return func_20(('gji' + 'ajpw'), func_15('uhul'))

Can you predict the output of `main_solution("nlacbser")` 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": "nlacbser"}, "ref_output": "g\u00abjui\u00bba\u00abjhp\u00bbw\u00abu\u00bb\u00abl\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('gji' + 'ajpw'), func_15('uhul'))", "funcname": "main_solution"}
rule