Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 安娜有50支铅笔，哈利有安娜铅笔数量的两倍，但他丢失了19支。哈利还剩下多少支铅笔？


### Response:
 哈利的铅笔数量是50 * 2 = <<50*2=100>>100支铅笔。
剩下的铅笔数量是100 - 19 = <<100-19=81>>81支铅笔。