#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */ 
    int n,ans=0;
    cin >> n;
    string s;
    cin >> s;
    int cnt=0;
    for(int i=0;i<s.length();i++)
    {
        if(s[i]>='0'&&s[i]<='9')
            cnt++;
    }
    if(cnt == 0)
        ans++;
    cnt = 0;
    for(int i=0;i<s.length();i++)
    {
        if(s[i]>='a'&&s[i]<='z')
            cnt++;
    }
    if(cnt == 0)
        ans++;
     cnt = 0;
    for(int i=0;i<s.length();i++)
    {
        if(s[i]>='A'&&s[i]<='Z')
            cnt++;
    }
    if(cnt == 0)
        ans++;
    string t = "!@#$%^&*()-+";
    cnt =0;
    for(int i=0;i<s.length();i++)
    {
        for(int j=0;j<t.length();j++)
        {
            if(s[i]==t[j])
            {
                cnt++;
                break;
            }
        }
    }
    if(cnt == 0)
        ans++;
    if(s.length()+ans < 6)
        ans += 6-(s.length()+ans);
    cout << ans << endl;
    return 0;
}