import Foundation

func charactersMissingForStrongPassword(){
    let nString = readLine() ?? "-1"
    let n = Int(nString)!
    let password = readLine() ?? "NoPass"
    
    let numbers = CharacterSet(charactersIn: "0123456789")
    let lower_case = CharacterSet(charactersIn: "abcdefghijklmnopqrstuvwxyz")
    let upper_case = CharacterSet(charactersIn: "ABCDEFGHIJKLMNOPQRSTUVWXYZ")
    let special_characters = CharacterSet(charactersIn: "!@#$%^&*()-+")
    
    var counter = 0
    
    if password.rangeOfCharacter(from: numbers) == nil {
        counter += 1
    }
    
    if password.rangeOfCharacter(from: lower_case) == nil {
        counter += 1
    }
    
    if password.rangeOfCharacter(from: upper_case) == nil {
        counter += 1
    }
    
    if password.rangeOfCharacter(from: special_characters) == nil {
        counter += 1
    }
    
    if n + counter < 6 {
        counter += 6 - n - counter
    }

    //print(n)
    //print(password)
    print(counter)
}

charactersMissingForStrongPassword()