#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
typedef long long int ll;
bool special(string s,int n)
{
    int i=0;
    while(s[i])
    {
        if(s[i]=='!'||s[i]=='@'||s[i]=='#'||s[i]=='$'||s[i]=='%'||s[i]=='^'||s[i]=='&'||s[i]=='*'||s[i]=='('||s[i]==')'||s[i]=='-'||s[i]=='+')
          return true;
        i++;
    }
    return false;
}
bool small(string s,int n)
{
    int i=0;
    while(s[i])
    {
        if(s[i]>='a'&&s[i]<='z')
            return true;
        i++;
    }
    return false;
}
bool capital(string s,int n)
{
    int i=0;
    while(s[i])
    {
        if(s[i]>='A'&&s[i]<='Z')
            return true;
        i++;
    }
    return false;
}
bool isnum(string s,int n)
{
    int i=0;
    while(s[i])
    {
        if(s[i]>='0'&&s[i]<='9')
            return true;
        i++;
    }
    return false;
}
int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int n;
    string s;
    cin>>n;
    cin>>s;
    ll count=0;
    if(!special(s,n))
    {
        count++;
    }
    if(!small(s,n))
    {
        count++;
    }
    if(!capital(s,n))
    {
        count++;
    }
    if(!isnum(s,n))
    {
        count++;
    }
    if(count+n<6)
    {
        count+=6-(n+count);
    }
    cout<<count<<endl;
    return 0;
}