You are given a code:

def main_solution(x):
    return (('bqsb' + 'zvapi') + ('fste' + 'uccx'))

Can you predict the output of `main_solution("ftgmikuli")` 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": "ftgmikuli"}, "ref_output": "bqsbzvapifsteuccx", "ref_code": "def main_solution(x):\n    return (('bqsb' + 'zvapi') + ('fste' + 'uccx'))", "funcname": "main_solution"}
rule