You are given a code:

def main_solution(x):
    return (func_22('emmc') + func_4('bffp'))

Can you predict the output of `main_solution("dwkxkvh")` 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": "dwkxkvh"}, "ref_output": "emmcbffp", "ref_code": "def main_solution(x):\n    return (func_22('emmc') + func_4('bffp'))", "funcname": "main_solution"}
rule