You are given a code:

def main_solution(x):
    return func_5('rjke', 'low')

Can you predict the output of `main_solution("ftweb")` 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": "ftweb"}, "ref_output": "lowrjke", "ref_code": "def main_solution(x):\n    return func_5('rjke', 'low')", "funcname": "main_solution"}
rule