Identify which instrument is string or woodwind: Gravikord, Heckelphone
Heckelphone is woodwind, Gravikord is string.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Identify which instrument is string or woodwind: Gravikord, Heckelphone
### Input: 
### Response: Heckelphone is woodwind, Gravikord is string.