Water molecule is described in the form of Z-matrix in the following file.
Reg asks to display highest five occupied and lowest five virtual molecular orbitals and other other information not included in the output by default. Test will prevent Gaussian from entering this jobs's results into the site archive. After another blank line, the water molecule is then specified. The first line of the molecule specifications gives the charge and spin multiplicity for the molecule as two free-format integers. Then, the water molecule is represented by Z-matrix format.