public class test{
	
	public static void main (String[] args){
		int [][] mat1 = {{1,2,3,4},
		           {5,6,7,8},
		           {9,10,11,12}};
		Matrix myMat = new Matrix(mat1);
		myMat.printMat();
		myMat.reverseAllRows();
		myMat.printMat();
      }  
      
	}