You are given a code:

def main_solution(x):
    return ('lvpa' + 'ybkxby')

Can you predict the output of `main_solution("lqwk")` 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": "lqwk"}, "ref_output": "lvpaybkxby", "ref_code": "def main_solution(x):\n    return ('lvpa' + 'ybkxby')", "funcname": "main_solution"}
rule