***********
*H-O H-O-H*
*  |      *
*  H   H  *
*      |  *
*H-O-H O-H*
***********

*******************
*H-O H-O-H O-H O-H*
*  |       |   |  *
*  H   H   H   H  *
*      |          *
*H-O-H O H-O H-O-H*
*      |   |      *
*  H   H   H   H  *
*  |           |  *
*H-O H-O H-O-H O-H*
*      |          *
*  H   H   H   H  *
*  |       |   |  *
*H-O H-O-H O-H O-H*
*******************