#include<bits/stdc++.h>
using namespace std;

int main(){
    int n;
    cin>>n;
    
    int a=1,b=1,c=1,d=1,e=6-n;
    string s;cin>>s;if(n>=6){e=0;}
    
    for(int i=0;i<n;i++){
        if(islower(s[i])){a=0;break;}
    }
    for(int i=0;i<n;i++){
        if(isupper(s[i])){b=0;break;}
    }
    for(int i=0;i<n;i++){
        if((s[i]-'0')>=0 && (s[i]-'0')<=9){c=0;}
    }
    for(int 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]=='*'){d=0;}
    }
    int x = a+b+c+d;
    if(e>0){
        cout<<e+((x-e>0)?x-e:0)<<endl;
    }else{
        cout<<x<<endl;
    }
}