#include<bits/stdc++.h> 
using namespace std;
int a[55],cnt,n;
string s;
int main()
{
    cin>>n;
	for(int i=1;i<=n;++i){
		cin>>s;
		if(s[0]=='C') a[i]+=13;
		if(s[0]=='H') a[i]+=26;
		if(s[0]=='S') a[i]+=39;
		if(s[1]=='A') 
		    a[i]+=1;
		else{
			if(s[1]=='T'){
				a[i]+=10;
			}else{
				if(s[1]=='J'){
					a[i]+=11;
				}else{
					if(s[1]=='Q'){
						a[i]+=12;
					}else{
						if(s[1]=='K'){
							a[i]+=13;
						}else{
							a[i]+=(s[1]-'0')+0;
						}
					}
				}
			}
		}
		for(int j=1;j<i;++j)
		    if(a[i]==a[j]){
		    	a[j]=0;
			}
	}	
    for(int i=1;i<=n;++i) 
	    if(a[i]) cnt++;
    cout<<52-cnt;
}