#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <stdio.h>


using namespace std;
int main(){
	string numbers = "0123456789";
	string lower_case = "abcdefghijklmnopqrstuvwxyz";
	string upper_case = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	string special_characters = "!@#$%^&*()-+";
	int len;
	cin >> len;
	string passwd;

	cin >>passwd;
	size_t found ;


	int n =1, l=1 , u=1, s =1;
	int i;
	char c;
	for(i=0; i < len; ++i){
		c = passwd[i];

		if( c >= '0' && c <= '9')
			n = 0;
		if( c >='a'  && c <='z')
			l= 0;
		if( c >= 'A' && c <= 'Z')
			 u =0;
		found = special_characters.find(c);
		if(found != std::string::npos)
			s = 0;
	}
	int ans = n + u + l + s;
	//cout <<"befoire ans "<<ans<<endl;
	if( ans + len < 6)
		ans += (6 - ans -len);
	cout <<ans<<endl;
	return 0;

}