#include <bits/stdc++.h>
using namespace std;

int poker[4][15];
//D-0,C-1,H-2,S-3
//A-1,T-10,J-11,Q-12,K-13

int main()
{
	int n, cnt = 0;
	int huase, dianshu;
	char ch1, ch2;
	cin >> n;

	while (n--)
	{
		cin >> ch1 >> ch2;
		if (ch1 == 'D')
			huase = 0;
		else if (ch1 == 'C')
			huase = 1;
		else if (ch1 == 'H')
			huase = 2;
		else if (ch1 == 'S')
			huase = 3;

		if (ch2 == 'A')
			dianshu = 1;
		else if (ch2 == 'T')
			dianshu = 10;
		else if (ch2 == 'J')
			dianshu = 11;
		else if (ch2 == 'Q')
			dianshu = 12;
		else if (ch2 == 'K')
			dianshu = 13;
		else
			dianshu = ch2 - '0';

		poker[huase][dianshu] = 1;
	}

	for (int i = 0; i < 4; i++)
	{
		for (int j = 1; j <= 13; j++)
		{
			if (poker[i][j] == 1)
				cnt++;
		}
	}

	cout << 52 -  cnt << endl;
	return 0;
}

#include <bits/stdc++.h>
using namespace std;

int main()
{
	set<string> poker;
	string t;
	int n;

	cin >> n;
	while (n--)
	{
		cin >> t;
		poker.insert(t);
	}

	cout << 52 - poker.size() << endl;

	return 0;
}