You are given a code:

def main_solution(x):
    return func_20(func_4('jbico'), func_15('brlm'))

Can you predict the output of `main_solution("ofa")` 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": "ofa"}, "ref_output": "j\u00abbbi\u00bbc\u00abor\u00bb\u00abl\u00bb\u00abm\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_4('jbico'), func_15('brlm'))", "funcname": "main_solution"}
rule