#include <iostream>
#include <map>
using namespace std;

bool isSpecialCharacterPresent(string password, map<char, bool> specialCharacters) {
    bool isStringGood = false;
    for(int i=0; i<password.size(); i++) {
        if (specialCharacters.find(password[i])!=specialCharacters.end()) {
            isStringGood = true;
            break;
        }
    }
    return isStringGood;
}
bool isLowerEnglishCharacterPresent(string password) {
    bool isStringGood = false;
    for(int i=0; i<password.size(); i++) {
        if (int(password[i])>=97 && int(password[i])<=122) {
            isStringGood = true;
            break;
        }
    }
    return isStringGood;
}
bool isUpperEnglishCharacterPresent(string password) {
    bool isStringGood = false;
    for(int i=0; i<password.size(); i++) {
        if (int(password[i])>=65 && int(password[i])<=90) {
            isStringGood = true;
            break;
        }
    }
    return isStringGood;
}
bool isNumericalDigitPresent(string password) {
    bool isStringGood = false;
    for(int i=0; i<password.size(); i++) {
        if (int(password[i])>=48 && int(password[i])<=57) {
            isStringGood = true;
            break;
        }
    }
    return isStringGood;
}
int returnRequiredSizeOfPassword(string password) {
    return password.size() >= 6 ? 0 : 6-int(password.size());
}

int main() {

    ios_base::sync_with_stdio(false);
    int N;
    cin >> N;
    
    map<char, bool> specialCharacters;
    //"!@#$%^&*()-+"
    
    specialCharacters['!'] = true;
    specialCharacters['@'] = true;
    specialCharacters['#'] = true;
    specialCharacters['$'] = true;
    specialCharacters['%'] = true;
    specialCharacters['^'] = true;
    specialCharacters['&'] = true;
    specialCharacters['*'] = true;
    specialCharacters['('] = true;
    specialCharacters[')'] = true;
    specialCharacters['-'] = true;
    specialCharacters['+'] = true;
    
    string password;
    cin >> password;
    
    int additionalCharacters = 0;
    int mandatoryCharacters = returnRequiredSizeOfPassword(password);

    if (!isNumericalDigitPresent(password))
        additionalCharacters++;
    if (!isLowerEnglishCharacterPresent(password))
        additionalCharacters++;
    if (!isUpperEnglishCharacterPresent(password))
        additionalCharacters++;
    if (!isSpecialCharacterPresent(password, specialCharacters))
        additionalCharacters++;
    
    if (mandatoryCharacters>additionalCharacters)
        cout << mandatoryCharacters;
    else
        cout << additionalCharacters;
    
    return 0;
}