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

### Instruction:
 Tina ana kalamu 12 za rangi ya pinki. Ana kalamu 9 chache za rangi ya kijani kuliko kalamu za pinki. Tina ana kalamu 3 zaidi za rangi ya buluu kuliko kalamu za rangi ya kijani. Tina ana jumla ya kalamu ngapi?


### Response:
 Tina ana kalamu 12 - 9 = <<12-9=3>>3 za rangi ya kijani.
Tina ana kalamu 3 + 3 = <<3+3=6>>6 za rangi ya buluu.
Tina ana jumla ya kalamu 12 + 6 + 3 = <<12+6+3=21>>21.