Compile and Execute Swift Online

import Foundation
import Glibc
    var input = "the quick brown fox jumps over the lazy dog"
    let a = "a".characters
    let e = "e".characters
    let i = "i".characters
    let o = "o".characters
    let u = "u".characters
    let consonants = "bcdfghjklmnpqrstvwxyz".characters
    var aCount = 0
    var eCount = 0
    var iCount = 0
    var oCount = 0
    var uCount = 0
    var consonantCount = 0

    for letter in input.lowercased().characters {
        if consonants.contains(letter) {
            consonantCount += 1
        } else {
            if a.contains(letter) {
                aCount += 1
            }
            if e.contains(letter) {
                eCount += 1
            }
            if i.contains(letter) {
                iCount += 1
            }
            if o.contains(letter) {
                oCount += 1
            }
            if u.contains(letter) {
                uCount += 1
            }
        }
    }
    print("A =", aCount)
    print("E =",eCount)
    print("I =",iCount)
    print("O =",oCount)
    print("U =",uCount)
    print("Consonant =",consonantCount)