/*nandishwar001*/
#include <bits/stdc++.h>
#define ll long long int
#define mod 1000000007
#define minn(x,y) (x<y?x:y)
using namespace std;
 
int main()
{
    int n,i,t,flag1=0,flag2=0,flag3=0,flag4=0,ans=0;
    string s;
    cin>>n;
    cin>>s;
    for(i=0;i<n;i++)
    {
        if(s[i]>='0'&& s[i]<='9')
        {
            flag1=1;
            break;
        }
    }
    if(!flag1)
        ans++;
    for(i=0;i<n;i++)
    {
        if(s[i]>='a'&& s[i]<='z')
        {
            flag2=1;
            break;
        }
    }
    if(!flag2)
        ans++;
    for(i=0;i<n;i++)
    {
        if(s[i]>='A'&& s[i]<='Z')
        {
            flag3=1;
            break;
        }
    }
    if(!flag3)
        ans++;
    for(i=0;i<n;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]=='-')
        {
            flag4=1;
            break;
        }
    }
    if(!flag4)
        ans++;
    if((ans+n)<6)
        ans+=(6-(ans+n));
    cout<<ans<<endl;
    return 0;
}