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

#define debug1(x)		  cout<<x<<endl
#define debug2(x,y)       cout<<x<<"   "<<y<<endl
#define debug3(x,y,z)     cout<<x<<"   "<<y<<"   "<<z<<endl
#define debug4(x,y,z,xy)  cout<<x<<"   "<<y<<"   "<<z<<"   "<<xy<<endl

#define sl(x) scanf("%lld",&x)
#define sll(x,y) scanf("%lld%lld",&x,&y)
#define slll(x,y,z) scanf("%lld%lld%lld",&x,&y,&z)
#define pl(x) printf("%lld\n",x)
#define pb(x) push_back(x)
#define mp(x,y) make_pair(x,y)
#define ff first
#define ss second
#define MAX 1000000
#define mod 1000000007
ll power(ll a, ll b) {ll ret=1;while(b) {if(b&1) ret*=a;a*=a;if(ret>=mod) ret%=mod;if(a>=mod) a%=mod;b>>=1;}return ret;}

string special;
string number="0123456789";
string lc = "abcdefghijklmnopqrstuvwxyz";
string uc = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
int main(){
    ll t,i,n,j,c=0,f=0;
    string s;
    cin>>n;
    cin>>s;
    special="!@#$%^&*()-+";
    for(i=0;i<s.size();i++){
        for(j=0;j<special.size();j++){
            if(s[i]==special[j]){
                f=1;
                break;
            }

        }
        if(f){
            break;
        }
    }
    if(f==0){
        c++;
    }
    f=0;
    for(i=0;i<s.size();i++){
        for(j=0;j<number.size();j++){
            if(s[i]==number[j]){
                f=1;
                break;
            }

        }
        if(f){
            break;
        }
    }
    if(f==0){
        c++;
    }
    f=0;
    ll f1=0;
    for(i=0;i<s.size();i++){
        for(j=0;j<uc.size();j++){
            if(s[i]==lc[j]){
                f=1;
            }
            if(s[i]==uc[j]){
                f1=1;
            }
        }

    }
    if(f==0){
        c++;
    }
    if(f1==0) c++;
    ll l=s.size();
    l+=c;
    if(l<6){
        c+=6-l;
    }
    cout<<c<<endl;
}