You are given a code:

def main_solution(x):
    return func_3('qzsrft')

Can you predict the output of `main_solution("sfcufl")` 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": "sfcufl"}, "ref_output": "fqrstz", "ref_code": "def main_solution(x):\n    return func_3('qzsrft')", "funcname": "main_solution"}
rule