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//counts a specific letter in a string
func SpecificLetterCount(str:String, char:Character) ->Int {
    var letters = Array(str); var count = 0
    for letter in letters {
        if letter == char {
            count += 1
        }
    }
    return count
}
// counts a specific word in a string
func SpecificWordCount(str:String, word:String) ->Int {
    var words = str.componentsSeparatedByString(" "); var count = 0
    for thing in words {
        if thing == word {
            count += 1
        }
    }
    return count
}

func CountAllWords(str:String) ->[String: Int] {
    var words = str.componentsSeparatedByString(" "); var wordcount = [String: Int]()
    for word in words {
        wordcount.updateValue(SpecificWordCount(str, word), forKey: word)
    }
    return wordcount
}