You are given a code:

def main_solution(x):
    return (func_20(x, 'hyduw') + func_13(x, '-'))

Can you predict the output of `main_solution("xaikrurfa")` 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": "xaikrurfa"}, "ref_output": "xhayidkurwurfax-a-i-k-r-u-r-f-a", "ref_code": "def main_solution(x):\n    return (func_20(x, 'hyduw') + func_13(x, '-'))", "funcname": "main_solution"}
rule