#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    bool cond[5]={false};
    int n ,i=0,no;
    cin>>n;
    no=n;
    char a[105];
    int count=0;
    if(n>=6)
        cond[0]=true;
    while(n--){
        cin>>a[i];
        if(a[i]>='0'&& a[i]<='9')
            cond[1]=true;
        else if(a[i]>='a' && a[i]<='z')
            cond[2]=true;
        else if(a[i]>='A' && a[i] <='Z')
            cond[3]=true;
        else cond[4]=true;
        i++;
    }
    
    for(i=1;i<5;i++){
        if(cond[i]==false)
            count++;
    }
    
    if(cond[0]==false && (no+count)<6){
        count+=(6-(count+no));
    }
    cout<<count<<endl;
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    return 0;
}