#include<bits/stdc++.h>
using namespace std;
int ans=52,m,n,k,l;
string s;
char c[53];
int main(){
	cin>>m;
	for(int i=1;i<=m;i++){
		cin>>s;
		if(s[0]=='D'){
			k=1;
		}else if(s[0]=='C'){
			k=2;
		}else if(s[0]=='H'){
			k=3;
		}else{
			k=0;
		}
		if(s[1]=='A'){
			k=k*13+1;
		}else if(s[1]=='T'){
			k=k*13+10;
		}else if(s[1]=='J'){
			k=k*13+11;
		}else if(s[1]=='Q'){
			k=k*13+12;
		}else if(s[1]=='K'){
			k=k*13+13;
		}else{
			k=k*13+(s[1]-'0');
		}
		if(c[k]==char(k+48)){
			ans=ans;
		}else{
			ans--;
			c[k]=char(k+48);
		}
		
		
	}
	cout<<ans;
}
/**************************************************************
	Problem: 2409
	User: zhengzihao
	Language: C++
	Result: Accepted
	Time:32 ms
	Memory:2076 kb
****************************************************************/