#include <bits/stdc++.h>
#define pb push_back 
#define x first 
#define y second 
#define MOD 10007
using namespace std;
typedef long long ll;
typedef pair< int , int > PII;
const int dirx[] = {0,1,0,-1};
const int diry[] = {1,0,-1,0};

int n, a[100100];
string s = "!@#$%^&*()-+";
string c;
bool u1, u2, u3, u4;

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    cin >> c;
    for (auto it : c){
		u1 |= (it >= '0' && it <= '9');
		u2 |= (it >= 'a' && it <= 'z');
		u3 |= (it >= 'A' && it <= 'Z');
		for (auto it2 : s) u4 |= (it == it2);
	}
	int rs = !u1 + !u2 + !u3 + !u4;
	n += rs;
	if (n < 6) rs += 6 - n;
	cout << rs;
}