You are given a code:

def main_solution(x):
    return func_20((x + 'bkv'), func_15('kbeq'))

Can you predict the output of `main_solution("tkhcqw")` 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": "tkhcqw"}, "ref_output": "t\u00abkkh\u00bbc\u00abqbw\u00bbb\u00abkev\u00bb\u00abq\u00bb", "ref_code": "def main_solution(x):\n    return func_20((x + 'bkv'), func_15('kbeq'))", "funcname": "main_solution"}
rule