#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> ii;

int dr[] = {-1, 0, 1, 0, -1, 1, 1, -1};
int dc[] = {0, 1, 0, -1, 1, 1, -1, -1};

bool hasDigit(string s) {
    for (int i = 0; i < (int) s.size(); i++) {
        if (s[i] >= '0' && s[i] <= '9') return true;
    }
    return false;
}

bool hasLower(string s) {
    for (int i = 0; i < (int) s.size(); i++) {
        if (s[i] >= 'a' && s[i] <= 'z') return true;
    }
    return false;
}

bool hasUpper(string s) {
    for (int i = 0; i < (int) s.size(); i++) {
        if (s[i] >= 'A' && s[i] <= 'Z') return true;
    }
    return false;
}

bool hasSpecial(string s) {
    for (int i = 0; i < (int) s.size(); i++) {
        if (s[i] == '!' || s[i] == '@' || s[i] == '#' || s[i] == '$' || s[i] == '%' || s[i] == '^' || s[i] == '&' || s[i] == '*' || s[i] == '(' || s[i] == ')' || s[i] == '-' || s[i] == '+') {
            return true;
        }
    }
    return false;
}

int main() {
	//freopen ("in.txt", "r", stdin);
	//freopen ("out.txt", "w", stdout);

    int n;

    while (scanf("%d", &n) == 1) {
        string s;
        cin >> s;

        int folcoEek = 0;
        
        if (!hasDigit(s)) folcoEek++;
        if (!hasLower(s)) folcoEek++;
        if (!hasUpper(s)) folcoEek++;
        if (!hasSpecial(s)) folcoEek++;
        
        if (folcoEek + (int) s.size() < 6) {
            folcoEek += 6 - (folcoEek + (int) s.size());
        }
        
        printf("%d\n", folcoEek);
    }

	return 0;
}