class Word
    constructor: (@word) ->

    getWord: ->
        @word.trim()

class WordGroup
    constructor: ->
        @end = []

    print: (cb) ->
        words = @process @end

        if typeof cb is 'function'
            cb words
        else
            console.log(words)

        return this

class Sentence extends WordGroup
    addWord: (word) ->
        word = new Word word if typeof word is 'string'
        word = word.getWord?()
        @end.push word if word
        return this

    process: ->
        words = @end.join ' '
        words[0].toUpperCase() + words.slice(1) + '.'

class Paragraph extends WordGroup
    addSentence: (sentence) ->
        sentence.print (string) =>
            @end.push string if string

        return this

    process: ->
        @end.join '  '