You are given a code:

def main_solution(x):
    return (func_5(x, 'ht') + func_15('zwnk'))

Can you predict the output of `main_solution("ysfwbvlv")` 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": "ysfwbvlv"}, "ref_output": "htysfwbvlv\u00abz\u00bb\u00abw\u00bb\u00abn\u00bb\u00abk\u00bb", "ref_code": "def main_solution(x):\n    return (func_5(x, 'ht') + func_15('zwnk'))", "funcname": "main_solution"}
rule