<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 If the coefficients $A$ and $B$ of the line $Ax+By=0$ can take different values from the set $\{0, 2, 3, 4, 5, 6\}$, the number of these equations representing different lines is. Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
18
If the coefficients $A$ and $B$ of the line $Ax+By=0$ can take different values from the set $\{0, 2, 3, 4, 5, 6\}$, the number of these equations representing different lines is.
test