<|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
 Maruska wrote one of ten consecutive natural numbers on each of ten cards. However, she lost one card. The sum of the numbers on the remaining nine cards was 2012. What number was written on the lost card? 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
223
Maruska wrote one of ten consecutive natural numbers on each of ten cards. However, she lost one card. The sum of the numbers on the remaining nine cards was 2012. What number was written on the lost card?
test