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

#define ll long long
#define mp make_pair
#define ss second
#define ff first
#define pb push_back
#define ld long double

const int N = 1e6 + 11;
const int MAX = 1e8;


int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int n;
    cin>>n;
    string s;
    getline(cin,s);
    getline(cin,s);
    int k=0,l=0,r=0,p=0;
    for (int i=0; i<s.size(); i++)
    {
        if (s[i]>='A'&&s[i]<='Z') k=1;
        if (s[i]>='a'&&s[i]<='z') l=1;
        if (s[i]>='0'&&s[i]<='9') r=1;
        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]=='+') p=1;
    }
    int res=1-k+1-l+1-r+1-p;
    if (res<6-n) res=6-n;
    cout<<res<<endl;
}