#include <cstdio>
#include <cstring>
struct Trie {
	int ch[100000][26];
	int ans;
	Trie() {
		ans=0;
		memset(ch[ans],0,sizeof(ch[ans]));
		ans++;
	}
	int idx(char c) {return c-'A';}
	void insert(char s[]) {
		int len=strlen(s);
		int u=0;
		for(int i=0;i<len;++i) {
			int c=idx(s[i]);
			if(!ch[u][c]) {
				ch[u][c]=ans++;
			}
			u=ch[u][c];
		}
	}
	int solve() {return ans;}
} trie;
int main() {
	freopen("trie.in","r",stdin);
	freopen("trie.out","w",stdout);
	char s[100];
	while(scanf("%s",s)==1) {
		trie.insert(s);
	}
	printf("%d\n",trie.solve());
	fclose(stdin);
	fclose(stdout);
	return 0;
}