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

### Instruction:
Janessa has a plan to give her brother Dexter his first collection of baseball cards. She currently has 4 cards in addition to the 13 that her father gave her.  She ordered a collection of 36 cards from eBay. After inspecting the cards she found 4 cards are in bad shape and decides to throw them away. Janessa ended up giving Dexter 29 cards. How many cards did Janessa keep for herself?

### Response:
 Janessa anaanza na kadi 4 + kadi 13 = <<4+13=17>>17.
Anaongeza 17 kadi + 36 kadi = <<17+36=53>>53 kutoka ununuzi wa eBay.
Janessa anachagua kutupa kadi 53 - kadi 4 = <<53-4=49>>49 kutokana na uharibifu.
Baada ya kumpa Dexter zawadi tunajua kuwa Janessa amezishika kadi 49 - kadi 29 = <<49-29=20>>20 kwa ajili yake mwenyewe.