/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		int count = 10;
        int i = 0;
        while (i < count) {
            int k = 0;
            while (k < i+1) {
                System.out.print("k");
                k++;
            }
            System.out.println();
            i++;
        }
	}
}

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