#include <bits/stdc++.h>

using namespace std;



int main() {
    int n,dig=0,low=0,up=0,sp=0,ans=0;
    cin >> n;
     for(int i=0;i<n;i++)
     {char a;
     cin>>a;
     if(a<58&&a>47) {dig++;}
      if(a<123&&a>96) {low++;}
      if(a>64&&a<91) {up++;}
      if(a== '!'||a=='@' ||a=='#' ||a=='$' ||a=='^' ||a=='&' ||a== '%'||a=='*' ||a=='(' ||a==')' ||a=='-' ||a=='+' )
      {sp++;}
     
     }
    
    if(dig<1) ans++;
        if(low<1) ans++;
            if(up<1) ans++;
                if(sp<1) ans++;
                    if(n+ans<6) ans=6-n;
    
    cout<<ans;
    return 0;
}