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


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */  
    int n;
    cin>>n;
    string s;
    cin>>s;
    string spe="!@#$%^&*()-+";
    bool sp={false},lo={false},up={false},di={false};
    for(int i=0;i<s.size();i++)
    {
        if(s[i]>='0'&&s[i]<='9')
        {di=true;}
        if(s[i]>='A'&&s[i]<='Z')
        {up=true;}
        if(s[i]>='a'&&s[i]<='z')
        {lo=true;}
        for(int j=0;j<spe.size();j++)
        {
            if(spe[j]==s[i])
            {sp=true;
            break;}
        }
    }
    int co=0;
    if(!sp){co++;}
    if(!lo){co++;}
    if(!up){co++;}
    if(!di){co++;}
    if((n+co)<6)
    {
        co+=abs(6-(co+n));
    }
    cout<<co<<endl;
    return 0;
}