tj

#include<iostream>
#include<cmath>
#include<algorithm>
#include<queue>
#include<stack>
#include<vector>
#include<cstdio>
#include<unordered_map>
#define ll long long
using namespace std;
const ll N=1e9;
string color="CDHS";
string number="23456789AJKQT";
bool vis[4][13];
ll ans=52;
int main() {
	ll n;
	cin>>n;
	for(ll i=0;i<n;i++) {
		char a,b;
		cin>>a>>b;
		ll idx1=0;
		for(ll i=0;i<color.size();i++) {
			if(a==color[i]) {
				idx1=i;
				break;
			}
		}
		ll idx2=0;
		for(ll i=0;i<number.size();i++) {
			if(b==number[i]) {
				idx2=i;
				break;
			}
		}
		if(!vis[idx1][idx2]) {
			vis[idx1][idx2]=true;
			ans--;
		}
	}
	cout<<ans;
}