#include <bits/stdc++.h>

using namespace std;

int main() {
    int n;
    cin >> n;
    char password[101];
    scanf("%s",password);
    int len=strlen(password);
    int i,flag1,flag2=1,flag3=1,flag4=1,flag5=1;
    if(len<6)
        flag1=6-len;
    else
        flag1=0;
    for(i=0;i<len;i++){
        if(password[i]>='0' && password[i]<='9')
            flag2=0;
        if(password[i]>='a' && password[i]<='z')
            flag3=0;
        if(password[i]>='A' && password[i]<='Z')
            flag4=0;
        if(password[i]=='!' || password[i]=='@' || password[i]=='#' || password[i]=='$' || password[i]=='%' || password[i]=='^' ||                   password[i]=='&' || password[i]=='*' || password[i]=='(' || password[i]==')' || password[i]=='-' || password[i]=='+')
            flag5=0;
    }
    int z=flag2+flag3+flag4+flag5,answer;
    if(z>=flag1)
        answer=flag2+flag3+flag4+flag5;
    else
        answer=flag1;
    cout << answer << endl;
    return 0;
}