#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define fastread ios_base::sync_with_stdio(false); cin.tie(NULL);
#define ll long long
int main()
{
	long long n,capl=0,sml=0,num=0,sp=0,i,ans=0,t;
	cin>>n;
	string s;
	cin>>s;
	for(i=0;i<s.length();i++)
	{
		if(s[i]>=65 && s[i]<=90)
		{
			capl++;
		}
		if(s[i]>=97 && s[i]<=122)
		{
			sml++;
		}
		if(s[i]>=48 && s[i]<=57)
		{
			num++;
		}
		if(s[i]=='!' || s[i]=='@' || s[i]=='#' || s[i]=='$' || s[i]=='%' || s[i]=='^' || s[i]=='&' || s[i]=='*' || s[i]=='(' || s[i]==')' || s[i]=='-' || s[i]=='+')
		{
			sp++;
		}
	}
	if(capl<1)
	{
		ans++;
	}
	if(sml<1)
	{
		ans++;
	}
	if(num<1)
	{
		ans++;
	}
	if(sp<1)
	{
		ans++;
	}
	if(ans+n<6)
	{
		ans+=(6-(ans+n));
	}
	cout<<ans<<endl;
}