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

### Instruction:
 Mara ya mwisho Bob alikata nywele zake alizikata hadi inchi 6. Sasa nywele zake ni urefu wa inchi 36. Ikiwa nywele hukua kwa kasi ya inchi 0.5 kwa mwezi, alitumia miaka mingapi kuzikua nywele zake?


### Response:
 Nywele zake zilikua inchi 36 - inchi 6 = <<36-6=30>>30.
Nywele hukua kwa kasi ya miezi 12/mwaka * inchi 0.5/mwezi = 6 inchi/mwaka.
Alitumia inchi 30 / inchi 6/mwaka = <<30/6=5>>5 miaka kuzikua nywele zake.