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#include <bits/stdc++.h>
using namespace std;
const int K = 130; //一个大于128的数字
const int MOD = 23333; //素数常数
int n; //字符串个数
int ans; //结果
string s; //字符串
// 链表
vector<string> linker[MOD + 10];
void insert(string t) {
//计算字符串t的HASH值
int hash = 1;
for (int i = 0; s[i]; i++) hash = (hash * K + s[i]) % MOD;
//找到HASH链表，逐个排查，存在，则结果不+1，否则+1
for (int i = 0; i < linker[hash].size(); i++)
if (linker[hash][i] == t) return;
//放入链表
linker[hash].push_back(t);
//结果+1
ans++;
}
int main() {
cin >> n;
for (int i = 1; i <= n; i++) cin >> s, insert(s);
cout << ans << endl;
return 0;
