If all hounds shown are trotting on a green surface, and one of the dogs is trotting leftward alongside a person on green carpet.
return hounds ;return surface ;return #2 that is green ;return #1 trotting on #3 ;return number of  #4 ;return number of  #1 ;return if  #5 is equal to  #6 ;return person ;return carpet ;return #9 that is green ;return #8 on #10 ;return #1 that are trotting leftward ;return #12 alongside #11 ;return number of  #13 ;return if  #14 is equal to  one ;return if  both  #7 and #15 are true
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