#include <iostream>
#include <cstdio>
#include <vector>
#include <cstring>
#include <string>
#include <map>
#include <climits>
#include <algorithm>
#include <queue>
#include <set>
#include <ctype.h>

using namespace std;

int main() {
    
    int n;
    cin >> n;
    string inp;
    cin >> inp;
    int low = 0, up = 0, dig = 0, spec = 0;
    string s_chars = "!@#$%^&*()-+";
    for (int i = 0; i < inp.size(); ++i) {
        if (isdigit(inp[i])) {
            dig++;
        } else if (isupper(inp[i])) {
            up++;
        } else if (islower(inp[i])) {
            low++;
        } else if (s_chars.find(inp[i]) != -1) {
            spec++;
        }
    }
    int a = 0, len = n;
    if (dig == 0) a++, len++;;
    if (up == 0) a++, len++;;
    if (low == 0) a++, len++;
    if (spec == 0) a++, len++;
    if (len < 6) a += (6 - len);
    cout << a << '\n';
}