You are given a code:

def main_solution(x):
    return func_4(func_5(x, 'rt'))

Can you predict the output of `main_solution("klqxic")` 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": "klqxic"}, "ref_output": "rtklqxic", "ref_code": "def main_solution(x):\n    return func_4(func_5(x, 'rt'))", "funcname": "main_solution"}
rule