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

### Instruction:
Cheryl ate 7 m&m's after lunch. She ate 5 m&m's after dinner, and she gave some to her sister. If Cheryl had 25 m&m's at the beginning, how many did she give to her sister?

### Response:
 เชริลกิน m&m's 7 + 5 = <<7+5=12>>12 ลูก
เธอให้น้องสาว 25 - 12 = <<25-12=13>>13 ลูก.