#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a[53]={0},k=52,j;
	string s[99];
	cin>>n;
	for(int i=0;i<n;i++){
		cin>>s[i];
		if(s[i][1]=='A') j=1;
		if(s[i][1]=='T') j=10;
		if(s[i][1]=='J') j=11;
		if(s[i][1]=='Q') j=12;
		if(s[i][1]=='K') j=13;
		if(s[i][1]>='0'&&s[i][1]<='9') j=s[i][1]-48;
		if(s[i][0]=='C') j+=13;
		if(s[i][0]=='S') j+=26;
		if(s[i][0]=='H') j+=39;
		if(a[j]==0){
			k--;
			a[j]=1;
		}
	}
	cout<<k;
return 0;}
//4
//DQ
//H3
//DQ
//DT
/**************************************************************
	Problem: 2409
	User: fzy001
	Language: C++
	Result: Accepted
	Time:37 ms
	Memory:2076 kb
****************************************************************/