Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
A pet store owner had 12 birds, 9 puppies, 5 cats, and 15 spiders. Half the birds were sold and 3 puppies were adopted. Then, someone left the spider enclosure open and 7 of them went loose. How many animals does the pet store owner have left?

### Response:
 Mmiliki wa duka la wanyama alikuwa na ndege 12/2 = <<12/2=6>>6 walioabaki.
Mmiliki wa duka la wanyama alikuwa na mbwa 9-3= <<9-3=6>>6 walioabaki.
Mmiliki wa duka la wanyama alikuwa na buibui 15 - 7 = <<15-7=8>>8 walioabaki.
Mmiliki wa duka la wanyama ana jumla ya wanyama 5+6 + 6 + 8 = <<5+6+6+8=25>>25 aliobaki nao.