#include <bits/stdc++.h>
#define f first
#define s second
#define mp make_pair
#define pb push_back
#define lp(i,a,n) for(int i=a;i<=n;++i)
#define lpd(i,a,n) for(int i=a;i>=n;--i)
#define mem(a,b) memset(a,b,sizeof a)
#define all(v) v.begin(),v.end()
#define println(a) cout <<(a) <<endl
#define sz(x) ((int)(x).size())
#define readi(x) scanf("%d",&x)
#define read2i(x,y) scanf("%d%d",&x,&y)
#define read3i(x,y,z) scanf("%d%d%d",&x,&y,&z)
#define mod 1000000007
#define eps 1e-8
#define infi 1000000000
#define infll 1000000000000000000ll
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vll;
typedef set<int> si;
typedef map<int,int> mii;

const int N = 100002;
int n;
string a;
string sp = "!@#$%^&*()-+";

int main(){
    readi(n);
    cin >>a;

    bool digit = false;
    bool upper = false;
    bool lower = false;
    bool special = false;
    for(char c : a){
        digit |= isdigit(c);
        upper |= isalpha(c) and isupper(c);
        lower |= isalpha(c) and islower(c);
        for(char x : sp) special |= c == x;
    }

    n += !digit + !upper + !special + !lower;
    int ans = !digit + !upper + !special + !lower;
    if(n < 6) ans += 6 - n;
    cout <<ans;
}

/*
freopen("input.txt","r",stdin);
freopen("output.txt","w",stdout);
*/