You are given a code:

def main_solution(x):
    return func_5(func_15(x), 'ezk')

Can you predict the output of `main_solution("dlelrkwwsz")` 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": "dlelrkwwsz"}, "ref_output": "ezk\u00abd\u00bb\u00abl\u00bb\u00abe\u00bb\u00abl\u00bb\u00abr\u00bb\u00abk\u00bb\u00abw\u00bb\u00abw\u00bb\u00abs\u00bb\u00abz\u00bb", "ref_code": "def main_solution(x):\n    return func_5(func_15(x), 'ezk')", "funcname": "main_solution"}
rule