#include <fstream>
#include <string.h>
#include <iostream>
using namespace std;

char s[101];
int n;

void r()
{
    cin >> n ;
    cin >>s;


}



int main()
{
    r();

    bool litere=0,LITERE=0,cifre=0,simboluri=0;

    for ( int i = 0 ; i < strlen(s); ++i)
    {
        if(s[i]>='0' && s[i] <= '9')cifre=true;
        else if(s[i]>='a'&&s[i]<='z')litere=true;
        else if(s[i]>='A'&&s[i]<='Z')LITERE=true;
        else simboluri=true;
    }
int cate=0;
if(!cifre)cate++;
if(!litere)cate++;
if(!LITERE)cate++;
if(!simboluri)cate++;
if(cate+n>=6){cout<<cate;return 0;}
else {
    n+=cate;

    cout<<cate+6-n;

}
    return 0;
}