#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
int main(){
//Citire date
char txt[15];
cin >> txt;
//Afisare prefixe
ofstream fout("bilet7.txt");
for(int i=1; i<strlen(txt); i++){
for(int j=1; j<= i; j++) cout << txt[j];
cout << endl;
}
fout.close();
}