#include <bits/stdc++.h>

using namespace std;

int main() {
    string a,b;
    cin >>a>>b;
    int sum =0;
    int s=0,k=0,k1=0,s1=0;
    for(int i =0;i < b.size();i++)
    {
          if(b[i] == '!'||b[i] == '@'||b[i] == '#'||b[i] == '$'||b[i] == '%'||b[i] == '^'||b[i] == '&'||b[i] == '*'||b[i] == '('||b[i] == ')'||b[i] == '+' || b[i] == '-')
          {
          	k=1;
          }
          if(b[i]>= 48 && b[i]<= 57){
          	s=1;
          }
          if(b[i] >= 65 && b[i] <= 90)
          {
          	s1=1;
          }
          if(b[i] >= 97 && b[i] <=122)
		  {
		  	k1=1;
		  }
    }
    k+=s;
    k+=s1;
    k+=k1;
    k= 4-k;
    int p;
    p = 6-b.size();
    cout << max(k,p);
    
}