Masha reads books most often in electronic form. Today she wanted to know how many different words are in the book she is currently reading. Help Masha write a program for this.
A word is a sequence of consecutive non-whitespace characters separated by one or more spaces.
Punctuation
.,;:-?! must be ignored.
Input
The program receives a line of text.
Imprint
Print the number of distinct words in this string.
Examples
| # |
Input |
Output |
| 1 |
This is my book! |
4 |
| 2 |
The next day, business began to pick up. Not abruptly, but bit by bit. A sack of potatoes here... |
18 |