Adds a random letter from the alphabet to a string in Swift
let alphabet = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]
func addfromalphabet(str: String) ->String {
var alphabetselector = alphabet[Int(arc4random_uniform(UInt32(alphabet.count)))]
var stringdisector = str + alphabetselector
return stringdisector
}