You are given a code:

def main_solution(x):
    return func_20(('ktwf' + 'sidt'), func_4('iqor'))

Can you predict the output of `main_solution("eshwo")` 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": "eshwo"}, "ref_output": "kitqwofrsidt", "ref_code": "def main_solution(x):\n    return func_20(('ktwf' + 'sidt'), func_4('iqor'))", "funcname": "main_solution"}
rule