~~~~~~~~~~~~~~~

#include<iostream>
#include<string>
#include<set>
#include<sstream>
using namespace std;
set<string> dict;          //string集合
int main
{
string s,buf;
while(cin>>s)
{
for(int i=0;i<s.length();i++)
{
if(isalpha(s[i]))
s[i]=tolower(s[i])
else
s[i]=' ';
stringstream ss(s);
while(ss>>buf)
dict.insert(buf);
}
for(set<string>::iterator it=dict.begin();it!=dict.end();++it)
count<<*if<<'\n';
return 0;
}
}