#include <bits/stdc++.h>
#include <string>

using namespace std;

int minimumNumber(int n, string password) {
    // Return the minimum number of characters to make the password strong

    
    string numbers = "0123456789";
    string lower_case = "abcdefghijklmnopqrstuvwxyz";
    string upper_case = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    string specialCharacters = "!@#$%^&*()-+";
        
    int minNumber = 0;
    


	if (!any_of(begin(password), end(password), ::islower))
		minNumber++;

	if (!any_of(begin(password), end(password), ::isupper))
		minNumber++;

	if (!any_of(begin(password), end(password), ::isdigit))
		minNumber++;
    
    bool flag = true;
    for(char p : password)
        for(char c : specialCharacters)
            if (p == c)
            {
                if(minNumber + n < 6)
                    return minNumber += 6 - n - minNumber;
                else
                    return minNumber;
                
            }
    minNumber++;
    
    if (minNumber + n < 6)
        return minNumber += 6 - n - minNumber;
    else
        return minNumber;
}

int main() {
    int n;
    cin >> n;
    string password;
    cin >> password;
    int answer = minimumNumber(n, password);
    cout << answer << endl;
    return 0;
}