You are given a code:

def main_solution(x):
    return func_5(func_13(x, '-'), 'tvr')

Can you predict the output of `main_solution("reoixjyqfe")` 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": "reoixjyqfe"}, "ref_output": "tvrr-e-o-i-x-j-y-q-f-e", "ref_code": "def main_solution(x):\n    return func_5(func_13(x, '-'), 'tvr')", "funcname": "main_solution"}
rule