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

### Instruction:
Fred has 38 red marbles, half as many green ones, and the rest are dark blue. If he has 63 marbles, how many of them are dark blue?

### Response:
 Fred ana mabulinge ya kijani 38/2 = <<38/2=19>>19.
Fred ana mabulinge ya buluu yenye giza 63-38-19 = <<63-38-19=6>>6.