#include <bits/stdc++.h>
#define scan(x) scanf("%d",&x)
#define scanl(x) scanf("%lld",&x)
#define print(x) printf("%d\n",x)
#define printl(x) printf("%lld\n",x)
#define prints(x) printf("%s\n",x)

#define REP(i,a,b) for(int i=0;i<b;i+=a)
#define BACK_REP(i,a,b) for(int i=b-1;i>=0;i-=a)
#define LREP(i,a,b) for(long long int i=0;i<b;i+=a)
#define BACK_LREP(i,a,b) for(long long int i=b-1;i>=0;i-=a)


#define F first
#define S second
#define PB push_back
#define MP make_pair
//not needed for acm-icpc
//freopen("input.txt", "r", stdin);
//freopen("output.txt", "w", stdout

using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pi;






/*vector<vector<int> > matrix(RR);
for ( int i = 0 ; i < RR ; i++ )
   matrix[i].resize(CC);
*/

int main() {
	ios::sync_with_stdio(0);
    cin.tie(0);
    int t; 
    cin>>t;
    string s;
    cin>>s;
    string numbers = "0123456789";
    string lower_case = "abcdefghijklmnopqrstuvwxyz";
    string upper_case = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    string special_characters = "!@#$%^&*()-+";
    int flag_num=0,flag_upper=0,flag_lower=0,flag_special=0;
    REP(i,1,s.size())
    {
      if(isdigit(s[i])&& flag_num==0)
	  {
	  	flag_num=1;
		  }	
      if(isupper(s[i])&&flag_upper==0)
      {
      	flag_upper=1;
	  }
	  
      if(islower(s[i])&&flag_lower==0)
      {
      	flag_lower=1;
	  }
	  if(flag_special==0)
	  {
	  
      REP(j,1,special_characters.size())    	
    	{
    		if(special_characters[j]==s[i])
    		{
    			flag_special=1;
    			break;
			}
		}
      }
      
      
      
      
      
	}
	
	int count=0;
    if(flag_lower==0)
    {
    	count++;
	}
	if(flag_upper==0)
    {
    	count++;
	}
	if(flag_special==0)
    {
    	count++;
	}
	if(flag_num==0)
    {
    	count++;
	}
	if(t+count<6)
	{
		count+=(6-(t+count));
	}
   
   cout<<count<<endl;
   return 0;
}