Supplemental Arrows-A unicode subset

Here is the list of 16 utf-8 characters in Supplemental Arrows-A subsets.

⟰ ⟱ ⟲ ⟳ ⟴ ⟵ ⟶ ⟷ ⟸ ⟹ ⟺ ⟻ ⟼ ⟽ ⟾ ⟿