#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, c=0,i,flag=0;
    cin>>n;
    char ch[n];
    for(i=0;i<n;i++)
        cin>>ch[i];
    
    for(i=0;i<n;i++)
    {
        if(ch[i]>=48 && ch[i]<=58)
        {
            flag=1;
            break;
        }
         
    }
    if(flag==0)
        c++;
    flag=0;
    for(i=0;i<n;i++)
    {
        if(ch[i]>=97 && ch[i]<=122)
        {
            flag=1;
            break;
        }
        }
    if(flag==0)
        c++;
    flag=0;
    for(i=0;i<n;i++)
    {
        if(ch[i]>=65 && ch[i]<=90)
        {
            flag=1;
            break;
        }
        
    }
    if(flag==0)
        c++;
    flag=0;
    for(i=0;i<n;i++)
    {
        if(ch[i]=='!'||ch[i]=='@'||ch[i]=='#'||ch[i]=='$'||ch[i]=='%'||ch[i]=='^'||ch[i]=='&'||ch[i]=='*'||ch[i]=='('||ch[i]==')'||ch[i]=='-'||ch[i]=='+')
        {
            flag=1;
        
            break;
        }
        }
        if(flag==0)
            c++;
    
    if(n>=6)
        cout<<c<<endl;
    else if((n+c)>=6)
        cout<<c<<endl;
    else
        cout<<(6-n)<<endl;
    return 0;
}