func result(input: String) -> String {
    let stuName = ["a","c","h","f","e","i"]
    for ja in stuName {
        if ja == input {
            return ""
        }
    }



func result2(input2: String) -> String {
    let stuPercent = ["93%","75%","65%","58%","43%","Sorry you failed"]
    for la in stuPercent {
        if la == stuName[0] {
            return "Congratulations you! got \(stuPercent[0])"
        }
    }
    return "You can do better! Best of luck for ahead."
}
    print("You are a registered member. Please press eneter again and type your name again.")
    let presEn: String = readLine()!
    print(result2(input2: presEn))

    return "Sorry! you're not registered"

}

print("Type your name")
var myName: String = readLine()!
print(result(input: myName))