Return a string that is composed of the first character of every element on odd-numbered rows in the 2D array words. If there are no odd-numbered rows, then return "?".

Important Note: Copy the following two methods into the window and don't change 
array2DFirstChars.  CodingBat does not allow 2D array parameters, so this method is accepting 
the number of rows, number of columns, and a 1D array.  The first method takes this 
information and creates a 2D array named words that you will be using. Enter your code into 
method array2DFirstCharsB:

public String array2DFirstChars(int rows, int cols, String[] array)
{
	String[][] array2D = new String[rows][cols];
	int idx = 0;
	for (int r=0; r<rows; r++)
	{
		for (int c=0; c<cols; c++)
		{
			array2D[r][c] = array[idx];
			idx++;
		}
	}
	return array2DFirstCharsB(array2D);
}

public String array2DFirstCharsB(String[][] words) { 

}