You are given a code:

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

Can you predict the output of `main_solution("jtxpynkiy")` 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": "jtxpynkiy"}, "ref_output": "c-k-m-g-m-z-l-c-a", "ref_code": "def main_solution(x):\n    return func_13(('ckm' + 'gmzlca'), '-')", "funcname": "main_solution"}
rule