You are given a code:

def main_solution(x):
    return ('yabbl' + 'ojkqhg')

Can you predict the output of `main_solution("jul")` 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": "jul"}, "ref_output": "yabblojkqhg", "ref_code": "def main_solution(x):\n    return ('yabbl' + 'ojkqhg')", "funcname": "main_solution"}
rule