#include <bits/stdc++.h>
using namespace std;
#define accelerate ios::sync_with_stdio(false),cin.tie(0),cout.tie(0)
#define int unsigned long long
#define mod 1000000007
#define ll unsigned long long
#define PII pair<int,int>
#define INF 0x3f3f3f3f
const int N=1e4+10;
const int base=53;
int n,m,k,x,y,T,xx,yy;
int hashh[N];
char a[N];
set<int>s;
signed main(){
	accelerate;
	cin>>T;
	while(T--){
		cin>>a+1;
		int len=strlen(a+1);
		for(int i=1;i<=len;i++){
			hashh[i]=hashh[i-1]*base+(a[i]-'0'+1);
		}
		s.insert(hashh[len]);
	}
	cout<<s.size();
	return 0;
}