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

### Instruction:
An animal shelter recently took in twelve cats. The shelter already had half that number of cats. Two days later, three had been adopted. The next day, one of the cats had five kittens, and one person arrived to pick up one of the cats that was their missing pet. How many cats does the shelter have now?

### Response:
 Kituo kilianza na paka 12 / 2 = <<12/2=6>>6.
Kisha wakapokea paka 12 zaidi, jumla ya paka 6 + 12 = <<6+12=18>>18.
Paka watatu walikuwa wameadoptiwa, hivyo walikuwa na 18 - 3 = <<18-3=15>>15 paka.
Paka mmoja alizaa watoto watano, ambao walibaki na mama yao, hivyo walikuwa na 15 + 5 = <<15+5=20>>20 paka.
Mmiliki wa paka alikuja kuchukua paka wake aliyepotea, hivyo sasa wana paka 20 - 1 = <<20-1=19>>19.