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

### Instruction:
 格雷西比格雷森矮7英寸。格雷森比格里芬高2英寸。格里芬身高61英寸。格雷西身高多少英寸？


### Response:
 格雷森 = 61 + 2 = <<61+2=63>>63英寸
格雷西 = 63 - 7 = <<63-7=56>>56英寸
格雷西身高56英寸。