<|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
 Find the sum of all four-digit positive integers greater than 2019 that can be formed by placing two consecutive two-digit positive integers in decreasing order. Express your answer as a single integer. 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
478661
Find the sum of all four-digit positive integers greater than 2019 that can be formed by placing two consecutive two-digit positive integers in decreasing order. Express your answer as a single integer.
test