Sort the following words into two groups, nouns and verbs.
Dance, Walk, Smile
Nouns: None

Verbs: Dance, Walk, Smile
Complete the following task based on the instruction and optional input provided.### Instruction:
Sort the following words into two groups, nouns and verbs.

### Input:
Dance, Walk, Smile

### Output:
Nouns: None

Verbs: Dance, Walk, Smile