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


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int nt;
    string str;
    cin>>nt;
    cin>>str;
    int count=0,found;
    int ans=0;
    string numbers = "0123456789";
 string lower_case = "abcdefghijklmnopqrstuvwxyz";
string upper_case = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
string special_characters = "!@#$%^&*()-+";
    found=str.find_first_of(numbers);
    if(found!=string::npos)
         count++;
    found=str.find_first_of(lower_case);
    if(found!=string::npos)
         count++;
    found=str.find_first_of(upper_case);
    if(found!=string::npos)
         count++;
    found=str.find_first_of(special_characters);
    if(found!=string::npos)
         count++;
    
    ans=4-count;
    nt+=ans;
    if(nt<6){
        ans+=6-nt;
    }
    
    cout<<ans;
    return 0;
}