### Problem Statement

We want to be able to judge whether text is suitable for a particular age group. We will base our judgment on the average length of a word in the text, so we need to define what a "word" is.

We define a "word" to be a maximal sequence of letters ('A'-'Z' and/or 'a-z') within a single line. (Maximal means that if 2 letters are adjacent within a line, they are in the same word.) But if a line ends with a sequence of one or more letters immediately followed by a hyphen ('-') and the next line starts with a sequence of one or more letters, all these letters are considered to be in the same word. It is even possible that a hyphenated word could extend across several lines (see Example 2).

Create a class Hyphenated that contains a method avgLength that is given a String[] lines containing the lines of text and that returns the average length of the words within the text.

### Definition

 Class: Hyphenated Method: avgLength Parameters: String[] Returns: double Method signature: double avgLength(String[] lines) (be sure your method is public)

### Notes

-A return value with either an absolute or relative error of less than 1.0E-9 is considered correct.

### Constraints

-lines will contain between 1 and 50 elements inclusive.
-Each element of lines will contain between 1 and 50 characters inclusive.
-Each character in each element of lines will be a letter ('A-'Z' or 'a'-'z') or will be one of these: ' ', '-', '.'
-At least one element of lines will contain a letter.

### Examples

0)

 `{" now is the ex-", "ample. "} `
`Returns: 3.75`
 There are 4 words: now, is, the, example
1)

 `{" now is the ex-", " ample. "}`
`Returns: 3.0`
 There are 5 words: now, is, the, ex, ample Note that the leading blank prevents the joining of ex and ample. Also note that words only consist of letters, so the hyphen is never a part of a word.
2)

 `{"inter-","national-","ization.."}`
`Returns: 20.0`
 There is only one word.
3)

 `{"All the time I have well-defined "," trouble."}`
`Returns: 4.125`
 Note that well-defined consists of 2 separate words.
4)

 `{"hello-","-","-","-","great"}`
`Returns: 5.0`

#### Problem url:

http://www.topcoder.com/stat?c=problem_statement&pm=1911

#### Problem stats url:

http://www.topcoder.com/tc?module=ProblemDetail&rd=5848&pm=1911

dgoodman

#### Testers:

lbackstrom , brett1479

String Parsing