import javax.swing.JOptionPane;

public class SteviloCrk {
    public static void main(String[] args) {
        //preberemo niz
        String niz = JOptionPane.showInputDialog("Vnesi poljuben niz: ");

        //sprehodimo se po nizu
        for (int i = 0; i < niz.length(); ++i) {
            char crka = niz.charAt(i);
            //veckrat izpisemo crko
            for (int j = 0; j <= i; ++j) System.out.print(crka);
            System.out.println();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;

namespace SteviloCrk {
class SteviloCrk {
    static void Main(string[] args) {
        //preberemo niz
        Console.Write("Vnesi poljuben niz: ");
        String niz = Console.ReadLine();

        //sprehodimo se po nizu
        for (int i = 0; i < niz.Length; ++i) {
            char crka = niz[i];
            //veckrat izpisemo crko
            for (int j = 0; j <= i; ++j) Console.Write(crka);
            Console.WriteLine();
        }
        Console.ReadKey();
    }
}
}

'''
Created on 1.7.2009

@author: fajdigap
'''
#preberemo niz
niz = input("Vnesi svoje ime: ")
#sprehodimo se po nizu
for i in range(len(niz)):
    crka = niz[i]
    #veckrat izpisemo crko
    for j in range(i+1):
        print(crka,end='')
    print()