response: Well, the western Ghubar Arabs' main contribution was to make the longer line diagonal rather than straight, though they showed some tendencies to making the character more rectilinear.
history: 7 is my favourite lucky number! Neat! Have you heard of how the Hindus wrote the number 7? It was more like an upside-down J. Really? What other cultures have history with the letter?
knowledge: The western Ghubar Arabs' main contribution was to make the longer line diagonal rather than straight, though they showed some tendencies to making the character more rectilinear.