You are given a code:

def main_solution(x):
    return (func_13('kcxqck', '-')).lower()

Can you predict the output of `main_solution("fzajp")` 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": "fzajp"}, "ref_output": "k-c-x-q-c-k", "ref_code": "def main_solution(x):\n    return (func_13('kcxqck', '-')).lower()", "funcname": "main_solution"}
rule