You are given a code:

def main_solution(x):
    return ('yhf' + 'verw')

Can you predict the output of `main_solution("eyzjyccxoj")` 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": "eyzjyccxoj"}, "ref_output": "yhfverw", "ref_code": "def main_solution(x):\n    return ('yhf' + 'verw')", "funcname": "main_solution"}
rule