The Simpsons
`- name = Homer

##</code><code>##

return('HASH', undef, grep { !/^surname$/} keys %$s) ;

##</code><code>##

The Simpsons
|- wife 
|  `- name = Marge 
|- name = Homer 
`- kids 
   |- 0 
   |  `- name = Bart 
   |- 1 
   |  `- name = Lisa 
   `- 2 
      `- name = Maggie