#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
using namespace std;
bool compare(const string &a,const string &b)
{
    if(a.length() != b.length()){
        return a.length() <  b.length();
    }
    else{
        return a < b;
    }
}
int main() {
    int n;
    cin >> n;
    vector<string> zc;
    int gg;
    string pl;
    for(int i = 0;i < n;i++){
        cin >> pl;
        zc.push_back(pl);
    }
    sort(zc.begin(),zc.end(), compare);

    zc.erase(unique(zc.begin(), zc.end()),zc.end());
            
        
    
    for (int i = 0;i < zc.size();i++ ) {
        cout << zc[i]<< endl;
    }
    return 0;
}