<|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
 Pinocchio correctly solved the example but smudged his notebook.

Behind each blot is hidden the same digit different from zero. Find this digit. 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
5
Pinocchio correctly solved the example but smudged his notebook.

Behind each blot is hidden the same digit different from zero. Find this digit.
test