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

### Instruction:
Henry went to the beach and picked up 17 perfect shells and 52 broken shells. Out of those 52 broken shells, half of them were spiral. Out of the 17 perfect shells, 12 of them were not spiral. How many more broken spiral shells were there than perfect spiral shells?

### Response:
 Makombe 52 yaliyovunjika / 2 = <<52/2=26>>26 makombe ya umbo la kisulisuli yaliyovunjika
Makombe 17 kamili - 12 makombe kamili yasiyo ya umbo la kisulisuli = 5 makombe kamili ya umbo la kisulisuli
26 - 5 = <<26-5=21>>21 makombe ya umbo la kisulisuli yaliyovunjika zaidi