#include <iostream>

using namespace std;

int n;
char s[110];
char special[] = {'!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '-' };

bool Find(char x)
{
	for (int i = 0;i <= 10;++i)
		if (x == special[i])
			return true;
	return false;
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin >> n;
	int ans = 0;
	bool digit = false;
	bool lowercase = false;
	bool uppercase = false;
	bool ch = false;
	bool dim = false;
	char c;
	for (int i = 1;i <= n;++i)
	{
		cin >> c;
		if ('a' <= c && c <= 'z')
			lowercase = true;
		if ('A' <= c && c <= 'Z')
			uppercase = true;
		if (Find(c))
			ch = true;
		if ('0' <= c && c <= '9')
			digit = true;
	}
	if (lowercase == false)
	{
		++ans;
		++n;
	}
	if (uppercase == false)
	{
		++ans;
		++n;
	}
	if (digit == false)
	{
		++ans;
		++n;
	}
	if (ch == false)
	{
		++ans;
		++n;
	}
	if (n < 6)
	{
		ans += 6 - n;
	}
	cout << ans << "\n";
	return 0;
}