-- Input
(1,1)
Test decreasing 0x1 to 0x0
Test decreasing 0xa to 0x9
Test decreasing 0x10 to 0xf
Test decreasing 0x20 to 0x1f
Test decreasing 0x100 to 0xff
-- Output
(5,20)
Test decreasing 0x0 to 0x0
Test decreasing 0x9 to 0x9
Test decreasing 0xf to 0xf
Test decreasing 0x1f to 0x1f
Test decreasing 0xff to 0xff
-- Events
<C-x>j<C-x>j<C-x>j<C-x>j<C-x>