If there are just two skunks and no other animals.
return skunks ;return the  number of  #1 ;return if  #2 is equal to  two ;return other animals ;return the  number of  #4 ;return if  #5 is equal to  zero ;return if  both  #3 and #6 are true
['select', 'aggregate', 'boolean', 'select', 'aggregate', 'boolean', 'boolean']