You are given a code:

def main_solution(x):
    return func_5(('sdm' + 'jsak'), 'peqh')

Can you predict the output of `main_solution("vknrsf")` 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": "vknrsf"}, "ref_output": "peqhsdmjsak", "ref_code": "def main_solution(x):\n    return func_5(('sdm' + 'jsak'), 'peqh')", "funcname": "main_solution"}
rule