Java String Tokens

Java String Tokens

Difficulty	Max Score	Success Ratio
Easy	15	82.41%

Given a string, [SVG image] , matching the regular expression [A-Za-z !,?._'@]+, split the string into tokens. We define a token to be one or more consecutive English alphabetic letters. Then, print the number of tokens, followed by each token on a new line.

Note: You may find the String.split method helpful in completing this challenge.

Input Format

A single string, [SVG image] .

Constraints

• [SVG image]
• [SVG image] is composed of any of the following: English alphabetic letters, blank spaces, exclamation points (!), commas (,), question marks (?), periods (.), underscores (_), apostrophes ('), and at symbols (@). Output Format

On the first line, print an integer, [SVG image] , denoting the number of tokens in string [SVG image] (they do not need to be unique). Next, print each of the [SVG image] tokens on a new line in the same order as they appear in input string [SVG image] .

Sample Input

He is a very very good boy, isn't he?

Sample Output

10
He
is
a
very
very
good
boy
isn
t
he

Explanation

We consider a token to be a contiguous segment of alphabetic characters. There are a total of [SVG image] such tokens in string [SVG image] , and each token is printed in the same order in which it appears in string [SVG image] .

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