C:\Old_Data\perlp>perl t5.pl
$VAR1 = {
          'y1' => '3',
          'z1' => '4',
          'x2' => '3',
          'z2' => '7',
          'x1' => '2',
          'x3' => '4',
          'z3' => '10',
          'y2' => '5',
          'y3' => '7'
        };