#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <regex>

using namespace std;

bool has_range(string s, char low, char high) {
    for(char c : s) {
        if(c >= low && c <= high)
            return true;
    }
    return false;
}

int main() {
    regex specials("[@#$%^&*()+!-]");
    
    int n; cin >> n;
    string s; cin >> s;
    
    int r = 0;
    if(!has_range(s, '0', '9'))
        r += 1;
    if(!has_range(s, 'a', 'z'))
        r += 1;
    if(!has_range(s, 'A','Z'))
        r += 1;
    if(!regex_search(s, specials))
        r += 1;
    if(s.size() < 6)
        r = max((int)(6 - s.size()), r);
    
    cout << r << endl;
    
    return 0;
}