Given a tweet, categorize it into one of the following emotions: happy, angry, sad, surprise
I can't believe how much I miss my grandpa
The emotion conveyed by the tweet is: Sad.
Complete the following task based on the instruction and optional input provided.### Instruction:
Given a tweet, categorize it into one of the following emotions: happy, angry, sad, surprise

### Input:
I can't believe how much I miss my grandpa

### Output:
The emotion conveyed by the tweet is: Sad.