You are given a code:

def main_solution(x):
    return func_13(func_20('skdrho', 'qumhq'), '-')

Can you predict the output of `main_solution("wrkrqc")` 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": "wrkrqc"}, "ref_output": "s-q-k-u-d-m-r-h-h-q-o", "ref_code": "def main_solution(x):\n    return func_13(func_20('skdrho', 'qumhq'), '-')", "funcname": "main_solution"}
rule