You are given a code:

def main_solution(x):
    return func_13(('fteie' + x), '-')

Can you predict the output of `main_solution("zcjgguhnwy")` 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": "zcjgguhnwy"}, "ref_output": "f-t-e-i-e-z-c-j-g-g-u-h-n-w-y", "ref_code": "def main_solution(x):\n    return func_13(('fteie' + x), '-')", "funcname": "main_solution"}
rule