#include<bits/stdc++.h>
using namespace std;
int main(){
	string a[52]={"DA","D2","D3","D4","D5","D6","D7","D8","D9","DT","DJ","DQ","DK","CA","C2","C3","C4","C5","C6","C7","C8","C9","CT","CJ","CQ","CK","HA","H2","H3","H4","H5","H6","H7","H8","H9","HT","HJ","HQ","HK","SA","S2","S3","S4","S5","S6","S7","S8","S9","ST","SJ","SQ","SK"};
	int b[52]={0};
	int n;
	cin>>n;
	for(int i=1;i<=n;i++){
		string n;
		cin>>n;
		for(int j=0;j<52;j++){
			if(n==a[j]&&b[i]==0){
				b[j]++;
			}
		}
	}
	int cnt=0;
	for(int i=0;i<52;i++){
		if(b[i]==0){
			cnt++;
		}
	}
	cout<<cnt;
	return 0;
}