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

### Instruction:
Bogan laid out 10 maggots for her pet beetle. The beetle only ate 1 and Bogan had to throw out the rest. Later that day, she tried feeding again and the beetle ate 3. If Bogan served 20 maggots in total, how many did she attempt to feed the beetle the second time?

### Response:
 โบแกนเตรียมมังกรทั้งหมด 20 ตัว
โบแกนให้ด้วงกินมังกร 10 ตัวครั้งแรก
โบแกนให้ด้วงกินมังกร 20-10=10 ตัวครั้งที่สอง