#include <bits/stdc++.h>
using namespace std;

int main()
{
 	//freopen("input", "r", stdin);
	//freopen("output", "w", stdout);
    
    int n;
    cin >> n;
    char s[1000];
    scanf("%s", s);
    int len = strlen(s), f1 = 1, f2 = 1, f3 = 1, f4 = 1;
    string str = "!@#$%^&*()-+";
    for (int i = 0; i < len; ++i)
    {
    	char c = s[i];
    	if (c >= '0' && c <= '9') f1 = 0;
    	if (c >= 'a' && c <= 'z') f2 = 0;
    	if (c >= 'A' && c <= 'Z') f3 = 0;
    	if (str.find(c) != string::npos) f4 = 0;
	}
	n += f1 + f2 + f3 + f4;
	int t = max(0, 6 - n);
	cout << t + f1 + f2 + f3 + f4 << endl; 
	return 0;
}