You are given a code:

def main_solution(x):
    return func_5('yctq', 'hibq')

Can you predict the output of `main_solution("tppnca")` 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": "tppnca"}, "ref_output": "hibqyctq", "ref_code": "def main_solution(x):\n    return func_5('yctq', 'hibq')", "funcname": "main_solution"}
rule