pancake.swift

func hackerSpeak(_ str: String) -> String {
  
    var stt = [Character]()
    var result = [Character]()
    
    for Character in str{
        stt.append(Character)
    }
    
    
    let a: Character = "a"
    let e: Character = "e"
    let i: Character = "i"
    let o: Character = "o"
    let s: Character = "s"
    
    for index in stt{
        

        
        result.append(index)

        if [index].contains(a){
            result.append(Character("4"))
             
        }
        
        if [index].contains(e) {
            
            result.append(Character("3"))
        }
        if [index].contains(i) {
            

            result.append(Character("1"))
        }
        if [index].contains(o) {
            

            result.append(Character("0"))
        }
        if [index].contains(s) {
            

            result.append(Character("5"))
        }

        
        continue
        
    }

    let result1 = result.filter {$0 != a}
    let result2 = result1.filter {$0 != e}
    let result3 = result2.filter {$0 != i}
    let result4 = result3.filter {$0 != o}
    let result5 = result4.filter {$0 != s}
    return String(result5)



    
}