Classify the emotion of the paragraph below. Output should be one of happiness, sadness, fear, anger or surprise.
I cannot believe it, I just accomplished something I thought was impossible.
surprise
Complete the following task based on the instruction and optional input provided.### Instruction:
Classify the emotion of the paragraph below. Output should be one of happiness, sadness, fear, anger or surprise.

### Input:
I cannot believe it, I just accomplished something I thought was impossible.

### Output:
surprise