請使用正則表達式檢查一個字串是否以特定字母開頭並以數字結尾。
`^[A-Za-z].*\d$`
Below is an instruction that describes a task. Write a response that appropriately completes the request. ### Instruction: 請使用正則表達式檢查一個字串是否以特定字母開頭並以數字結尾。 ### Response: `^[A-Za-z].*\d$` 