/* 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
	{
		// your code goes here
		int[][] mat = {
            {1, 2, 2, 1},
            {4, 3, 3, 4},
            {2, 3, 3, 2}
    	};
 
    	//assume the matrix is square
    	int rows = mat.length, columns = mat[0].length;
 
    	boolean symmetric = true;
    	for(int r = 0; r < rows && symmetric; r++){
    		//now declare two pointers one from left and one from right
    		int left = 0, right = columns - 1;
 
    		while (left < right){
    			if(mat[r][left] != mat[r][right]){
    				symmetric = false;
    				break;
    			}
    			right--;
    			left++;
    		}
    	}
 
    	System.out.println(symmetric? "The matrix is symmetric." : "The matrix isn't symmetric.");
	}
}

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