There is a problem in google docs for word count. If you type a word and it is followed by a double space like so: Bob went to the beach  and was tan. The program will count the double space as an extra word. Here is how to fix it:

var letters = Set<Character>()
for c in "abcdefghijklmnopqrstuvwxyz"{
    letters.insert(c)
}
var b: Bool = true
let mydocument = "once  upon a  time !there  was# a boy.  "
var numberOfWords = 0
for c in mydocument {
    if letters.contains(c) { 
        b = true
    }
    else {
        if b {
            numberOfWords += 1
        }
        b=false
    }
}
print("there are \(numberOfWords) words in my document")

Good Luck