import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    static int minimumNumber(int j, String st) {
          char ch;
        int i,k,l,in=0,c=0,C=0,sp=0,su=0;
        

        for(i=0;i<j;++i)
        {   ch=st.charAt(i);
            k=(int)ch;
            if(k>=48&&k<=57)
                ++in;
            if(k>=97&&k<=122)
                ++c;
            if(k>=65&&k<=90)
                ++C;
            if(k==33||k==64||k==35||k==36||k==37||k==91||k==38||k==42||k==40||k==41||k==95||k==43)
                ++sp;
            
        }
        if(in==0)
            ++su;
        if(c==0)
            ++su;
        if(C==0)
            ++su;
        if(sp==0)
            ++su;
        if((j+su)<6)
            su=su+(6-(j+su));
            return su;
        // Return the minimum number of characters to make the password strong
    }

    public static void main(String[] args) {
          char ch;
        int i,j,k,l,in=0,c=0,C=0,sp=0,su=0;
        
        Scanner sc= new  Scanner(System.in);
        String st;
        System.out.println("b");
        
        st=sc.nextLine();
        if(j>=1&&j<=100)
    {   st=sc.nextLine();
     su= minimumNumber(j,st);
        
        
        System.out.println(su);
   }
    }
}