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

bool isSpecial(char ch)
{
    char str[] = "!@#$%^&*()-+";
    int i;
    for(i=0;str[i]!='\0';i++)
    {
        if(str[i]==ch)
            break;
    }
    if(str[i]!='\0')
        return true;
    return false;
}

int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int n;
    cin>>n;
    char str[150];
    cin>>str;
    int small_letter_flg=1,capital_letter_flg=1,number_flg=1,special_flg=1;
    for(int i=0;str[i]!='\0';i++)
    {
        if('a'<=str[i] && str[i]<='z')
            small_letter_flg=0;
        else if('A'<=str[i] && str[i]<='Z')
            capital_letter_flg=0;
        else if('0'<=str[i] && str[i]<='9')
            number_flg=0;
        else if(isSpecial(str[i]))
            special_flg=0;
    }
    int add = small_letter_flg+capital_letter_flg+number_flg+special_flg;
    if((n+add)<6)
        add+=6-(n+add);
    cout<<add<<endl;
    return 0;
}