What is the smallest positive four-digit number divisible by 9 which has two even and two odd digits?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
What is the smallest positive four-digit number divisible by 9 which has two even and two odd digits?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
1089
What is the smallest positive four-digit number divisible by 9 which has two even and two odd digits?
train