Nm

#include <bits/stdc++.h>
using namespace std;
set <string>st;
int main() {
	string s;
    while(cin>>s)
    {
         for (int i = 0; i < s.size(); i++){
             s[i] = tolower(s[i]);
             if (s[i]-97<0) s [i]=s [i]-s [i];
         }
         st.insert (s);
     }
    st.erase (st.begin ());
    for (auto i:st) cout<<i <<endl;
	return 0;
}