#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;
    cin>>n;
    string a;
    cin>>a;
   int i,no=0,l=0,u=0,sp=0,c=0,len=a.length();
    for(i=0;i<n;i++)
    {
        if(a[i]>=48 && a[i]<=57)
            no=1;
        if(a[i]>=65 && a[i]<=90)
            u=1;
        if(a[i]>=97 && a[i]<=122)
            l=1;
        if(a[i]=='!'||a[i]=='@'||a[i]=='#'||a[i]=='$'||a[i]=='%'||a[i]=='^'||a[i]=='&'||a[i]=='*'||a[i]=='('||a[i]==')'||a[i]=='-'||a[i]=='+')
            sp=1;
    }
    if(no==0){c++;len++;}
    if(u==0){c++;len++;}
    if(l==0){c++;len++;}
    if(sp==0){c++;len++;}
    if(len<6)c=c+(6-len);
    cout<<c;
    return 0;
}