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


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    string numbers = "0123456789";
string lower_case = "abcdefghijklmnopqrstuvwxyz";
 string upper_case = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
string special_characters = "!@#$%^&*()-+";
    int n,count;
    string x;
    cin>>n;
    getchar();
    cin>>x;
    count=0;
    if (x.find_first_of(numbers) == std::string::npos)
    {
       
        count++;
    }
        if (x.find_first_of(lower_case) == std::string::npos)
    {
          
        count++;
    }
        if (x.find_first_of(upper_case) == std::string::npos)
    {
            
        count++;
    }
        if (x.find_first_of(special_characters) == std::string::npos)
    {
           
        count++;
    }
    if(count+n<6)
        count+=(6-(count+n));
    cout<<count;
    return 0;
}