#include <iostream>
#include <string>
#include <stdlib.h>
#include <sstream>
#include <math.h>
#include <stdio.h>
#include <map>
#include <vector>
using namespace std;

struct log1 {
    bool ok;
    string slovo;

};



vector< log1 > V;


int main(){
    long pocet = 0;
    string slovo;

    while(cin>>slovo){
log1 p;
p.ok=1;
p.slovo=slovo;
V.push_back(p);
pocet++;
 }   
    
int sum=0;
while(sum<86000){
int r=rand()%pocet;
if(V[r].ok==1){
V[r].ok=0;
cout<<V[r].slovo<<".";
sum+=V[r].slovo.length();
}





}

    cin.get();
    cin.get();
    
}