System.err.println(a[i][j]); System.err.println(b[i][j]);
	private static void compare(String testName, String[][] a, String[][] b){		if (a.length != b.length) {			System.err.println(testName + ": unexpected number of lines");			System.exit(1);		}		for(int i=0; i<a.length; i++){			if (a[i].length != b[i].length) {				System.err.println(testName + ": unexpected number of values in line: " + b[i].length);				System.exit(1);			}			for (int j=0; j<a[i].length; j++){				if (!a[i][j].equals(b[i][j])) {					System.err.println(testName + ": values do not match.");					System.exit(1);				}			}		}	}