private int[] getSq() {
			int startRow = row/SQ_SIZE * SQ_SIZE;
			int startCol = col/SQ_SIZE * SQ_SIZE;
			
			int[] sqNumbers = new int[SIZE];
			int  count = 0;
			for (int i = 0; i < SQ_SIZE; i++) {
				for (int j = 0; j < SQ_SIZE; j++) {
					sqNumbers[count] = grid[startRow + i][startCol + j];
					count++;
				}
			}
			return sqNumbers;
		}