/* 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 l, c, num = 0;
		int [][]m;
		m = new int[4][3];
		for (c = 0; c < 3; c++){
			for (l = 0; l < 4; l++){
				m[l][c] = num;
				num++;
			}
		}
		for (l = 0; l < 4; l++){
			for (c = 0; c < 3; c++){
				System.out.println(m[l][c]);
			}
		}
	}
}

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