You are given a code:

def main_solution(x):
    return func_17('tecc')

Can you predict the output of `main_solution("rftoctjv")` 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": "rftoctjv"}, "ref_output": "ccet", "ref_code": "def main_solution(x):\n    return func_17('tecc')", "funcname": "main_solution"}
rule