PROGRAMMING:Count words
Input several words, seperate by space/tab, count how many words within your input.
###Input format:
Input several words, seperate by spaces or tab, end by enter key (<100 characters) .
###Output format:
output the number of words
###Input example:
```in
this is the first time you're flying by yourself
```
###Output example:
```out
nine
```
answer：If there is no answer, please comment
###Input format:
Input several words, seperate by spaces or tab, end by enter key (<100 characters) .
###Output format:
output the number of words
###Input example:
```in
this is the first time you're flying by yourself
```
###Output example:
```out
nine
```
answer：If there is no answer, please comment