You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_15('eqwvcn'))

Can you predict the output of `main_solution("cktemewkep")` 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": "cktemewkep"}, "ref_output": "\u00ab\u00abce\u00bb\u00bb\u00ab\u00abkq\u00bb\u00bb\u00ab\u00abtw\u00bb\u00bb\u00ab\u00abev\u00bb\u00bb\u00ab\u00abmc\u00bb\u00bb\u00ab\u00aben\u00bb\u00bb\u00abw\u00bb\u00abk\u00bb\u00abe\u00bb\u00abp\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_15('eqwvcn'))", "funcname": "main_solution"}
rule