Find genotypes of the two parents of the litter

Long ears in some dogs are an autosomal dominant trait. Two dogs mate and produce a litter in which 75% of the puppies have long ears. Of the dogs with long ears in this litter, 1/3 are known to be phenocopies. What are the most likely genotypes of the two parents of this litter?
 
Please use a punnet square as part of explination. Please explain each step, I would like to understand how you got the answer. Thank you.
 
 
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